X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/5aa86a9053fb0fa15846bb60aac2fb8fdfff524a..3d39054f012aefe514b3f5509e32f09fc4feda44:/wp-admin/includes/media.php?ds=sidebyside

diff --git a/wp-admin/includes/media.php b/wp-admin/includes/media.php
index ff77e6c0..c6b2dcd1 100644
--- a/wp-admin/includes/media.php
+++ b/wp-admin/includes/media.php
@@ -7,11 +7,11 @@
  */
 
 /**
- * {@internal Missing Short Description}}
+ * Defines the default media upload tabs
  *
  * @since 2.5.0
  *
- * @return unknown
+ * @return array default tabs
  */
 function media_upload_tabs() {
 	$_default_tabs = array(
@@ -21,16 +21,25 @@ function media_upload_tabs() {
 		'library' => __('Media Library')
 	);
 
-	return apply_filters('media_upload_tabs', $_default_tabs);
+	/**
+	 * Filters the available tabs in the legacy (pre-3.5.0) media popup.
+	 *
+	 * @since 2.5.0
+	 *
+	 * @param array $_default_tabs An array of media tabs.
+	 */
+	return apply_filters( 'media_upload_tabs', $_default_tabs );
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Adds the gallery tab back to the tabs array if post has image attachments
  *
  * @since 2.5.0
  *
- * @param unknown_type $tabs
- * @return unknown
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param array $tabs
+ * @return array $tabs with gallery if post has image attachment
  */
 function update_gallery_tab($tabs) {
 	global $wpdb;
@@ -54,32 +63,29 @@ function update_gallery_tab($tabs) {
 
 	return $tabs;
 }
-add_filter('media_upload_tabs', 'update_gallery_tab');
 
 /**
- * {@internal Missing Short Description}}
+ * Outputs the legacy media upload tabs UI.
  *
  * @since 2.5.0
+ *
+ * @global string $redir_tab
  */
 function the_media_upload_tabs() {
-	global $redir_tab, $is_iphone;
+	global $redir_tab;
 	$tabs = media_upload_tabs();
-
-	if ( $is_iphone ) {
-		unset($tabs['type']);
-		$default = 'type_url';
-	} else {
-		$default = 'type';
-	}
+	$default = 'type';
 
 	if ( !empty($tabs) ) {
 		echo "<ul id='sidemenu'>\n";
-		if ( isset($redir_tab) && array_key_exists($redir_tab, $tabs) )
+		if ( isset($redir_tab) && array_key_exists($redir_tab, $tabs) ) {
 			$current = $redir_tab;
-		elseif ( isset($_GET['tab']) && array_key_exists($_GET['tab'], $tabs) )
+		} elseif ( isset($_GET['tab']) && array_key_exists($_GET['tab'], $tabs) ) {
 			$current = $_GET['tab'];
-		else
-			$current = apply_filters('media_upload_default_tab', $default);
+		} else {
+			/** This filter is documented in wp-admin/media-upload.php */
+			$current = apply_filters( 'media_upload_default_tab', $default );
+		}
 
 		foreach ( $tabs as $callback => $text ) {
 			$class = '';
@@ -96,106 +102,173 @@ function the_media_upload_tabs() {
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Retrieves the image HTML to send to the editor.
  *
  * @since 2.5.0
  *
- * @param unknown_type $id
- * @param unknown_type $alt
- * @param unknown_type $title
- * @param unknown_type $align
- * @param unknown_type $url
- * @param unknown_type $rel
- * @param unknown_type $size
- * @return unknown
+ * @param int          $id      Image attachment id.
+ * @param string       $caption Image caption.
+ * @param string       $title   Image title attribute.
+ * @param string       $align   Image CSS alignment property.
+ * @param string       $url     Optional. Image src URL. Default empty.
+ * @param bool|string  $rel     Optional. Value for rel attribute or whether to add a default value. Default false.
+ * @param string|array $size    Optional. Image size. Accepts any valid image size, or an array of width
+ *                              and height values in pixels (in that order). Default 'medium'.
+ * @param string       $alt     Optional. Image alt attribute. Default empty.
+ * @return string The HTML output to insert into the editor.
  */
-function get_image_send_to_editor($id, $caption, $title, $align, $url='', $rel = false, $size='medium', $alt = '') {
+function get_image_send_to_editor( $id, $caption, $title, $align, $url = '', $rel = false, $size = 'medium', $alt = '' ) {
 
-	$html = get_image_tag($id, $alt, $title, $align, $size);
+	$html = get_image_tag( $id, $alt, '', $align, $size );
 
-	$rel = $rel ? ' rel="attachment wp-att-' . esc_attr($id).'"' : '';
+	if ( $rel ) {
+		if ( is_string( $rel ) ) {
+			$rel = ' rel="' . esc_attr( $rel ) . '"';
+		} else {
+			$rel = ' rel="attachment wp-att-' . intval( $id ) . '"';
+		}
+	} else {
+		$rel = '';
+	}
 
 	if ( $url )
-		$html = '<a href="' . esc_attr($url) . "\"$rel>$html</a>";
-
+		$html = '<a href="' . esc_attr( $url ) . '"' . $rel . '>' . $html . '</a>';
+
+	/**
+	 * Filters the image HTML markup to send to the editor.
+	 *
+	 * @since 2.5.0
+	 *
+	 * @param string       $html    The image HTML markup to send.
+	 * @param int          $id      The attachment id.
+	 * @param string       $caption The image caption.
+	 * @param string       $title   The image title.
+	 * @param string       $align   The image alignment.
+	 * @param string       $url     The image source URL.
+	 * @param string|array $size    Size of image. Image size or array of width and height values
+	 *                              (in that order). Default 'medium'.
+	 * @param string       $alt     The image alternative, or alt, text.
+	 */
 	$html = apply_filters( 'image_send_to_editor', $html, $id, $caption, $title, $align, $url, $size, $alt );
 
 	return $html;
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Adds image shortcode with caption to editor
  *
  * @since 2.6.0
  *
- * @param unknown_type $html
- * @param unknown_type $id
- * @param unknown_type $alt
- * @param unknown_type $title
- * @param unknown_type $align
- * @param unknown_type $url
- * @param unknown_type $size
- * @return unknown
+ * @param string $html
+ * @param integer $id
+ * @param string $caption image caption
+ * @param string $title image title attribute
+ * @param string $align image css alignment property
+ * @param string $url image src url
+ * @param string $size image size (thumbnail, medium, large, full or added with add_image_size() )
+ * @param string $alt image alt attribute
+ * @return string
  */
 function image_add_caption( $html, $id, $caption, $title, $align, $url, $size, $alt = '' ) {
 
+	/**
+	 * Filters the caption text.
+	 *
+	 * Note: If the caption text is empty, the caption shortcode will not be appended
+	 * to the image HTML when inserted into the editor.
+	 *
+	 * Passing an empty value also prevents the {@see 'image_add_caption_shortcode'}
+	 * Filters from being evaluated at the end of image_add_caption().
+	 *
+	 * @since 4.1.0
+	 *
+	 * @param string $caption The original caption text.
+	 * @param int    $id      The attachment ID.
+	 */
+	$caption = apply_filters( 'image_add_caption_text', $caption, $id );
+
+	/**
+	 * Filters whether to disable captions.
+	 *
+	 * Prevents image captions from being appended to image HTML when inserted into the editor.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param bool $bool Whether to disable appending captions. Returning true to the filter
+	 *                   will disable captions. Default empty string.
+	 */
 	if ( empty($caption) || apply_filters( 'disable_captions', '' ) )
 		return $html;
 
 	$id = ( 0 < (int) $id ) ? 'attachment_' . $id : '';
 
-	if ( ! preg_match( '/width="([0-9]+)/', $html, $matches ) )
+	if ( ! preg_match( '/width=["\']([0-9]+)/', $html, $matches ) )
 		return $html;
 
 	$width = $matches[1];
 
-	$caption = str_replace(	array( '>',    '<',    '"',      "'" ),
-							array( '&gt;', '&lt;', '&quot;', '&#039;' ),
-							$caption
-						  );
+	$caption = str_replace( array("\r\n", "\r"), "\n", $caption);
+	$caption = preg_replace_callback( '/<[a-zA-Z0-9]+(?: [^<>]+>)*/', '_cleanup_image_add_caption', $caption );
+
+	// Convert any remaining line breaks to <br>.
+	$caption = preg_replace( '/[ \n\t]*\n[ \t]*/', '<br />', $caption );
 
 	$html = preg_replace( '/(class=["\'][^\'"]*)align(none|left|right|center)\s?/', '$1', $html );
 	if ( empty($align) )
 		$align = 'none';
 
-	$shcode = '[caption id="' . $id . '" align="align' . $align
-	. '" width="' . $width . '" caption="' . addslashes($caption) . '"]' . $html . '[/caption]';
+	$shcode = '[caption id="' . $id . '" align="align' . $align	. '" width="' . $width . '"]' . $html . ' ' . $caption . '[/caption]';
 
+	/**
+	 * Filters the image HTML markup including the caption shortcode.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param string $shcode The image HTML markup with caption shortcode.
+	 * @param string $html   The image HTML markup.
+	 */
 	return apply_filters( 'image_add_caption_shortcode', $shcode, $html );
 }
-add_filter( 'image_send_to_editor', 'image_add_caption', 20, 8 );
 
 /**
- * {@internal Missing Short Description}}
+ * Private preg_replace callback used in image_add_caption()
+ *
+ * @access private
+ * @since 3.4.0
+ */
+function _cleanup_image_add_caption( $matches ) {
+	// Remove any line breaks from inside the tags.
+	return preg_replace( '/[\r\n\t]+/', ' ', $matches[0] );
+}
+
+/**
+ * Adds image html to editor
  *
  * @since 2.5.0
  *
- * @param unknown_type $html
+ * @param string $html
  */
 function media_send_to_editor($html) {
 ?>
 <script type="text/javascript">
-/* <![CDATA[ */
 var win = window.dialogArguments || opener || parent || top;
-win.send_to_editor('<?php echo addslashes($html); ?>');
-/* ]]> */
+win.send_to_editor( <?php echo wp_json_encode( $html ); ?> );
 </script>
 <?php
 	exit;
 }
 
 /**
- * {@internal Missing Short Description}}
- *
- * This handles the file upload POST itself, creating the attachment post.
+ * Save a file submitted from a POST request and create an attachment post for it.
  *
  * @since 2.5.0
  *
- * @param string $file_id Index into the {@link $_FILES} array of the upload
- * @param int $post_id The post ID the media is associated with
- * @param array $post_data allows you to overwrite some of the attachment
- * @param array $overrides allows you to override the {@link wp_handle_upload()} behavior
- * @return int the ID of the attachment
+ * @param string $file_id   Index of the `$_FILES` array that the file was sent. Required.
+ * @param int    $post_id   The post ID of a post to attach the media item to. Required, but can
+ *                          be set to 0, creating a media item that has no relationship to a post.
+ * @param array  $post_data Overwrite some of the attachment. Optional.
+ * @param array  $overrides Override the wp_handle_upload() behavior. Optional.
+ * @return int|WP_Error ID of the attachment or a WP_Error object on failure.
  */
 function media_handle_upload($file_id, $post_id, $post_data = array(), $overrides = array( 'test_form' => false )) {
 
@@ -217,15 +290,70 @@ function media_handle_upload($file_id, $post_id, $post_data = array(), $override
 	$url = $file['url'];
 	$type = $file['type'];
 	$file = $file['file'];
-	$title = $name;
+	$title = sanitize_title( $name );
 	$content = '';
+	$excerpt = '';
 
-	// use image exif/iptc data for title and caption defaults if possible
-	if ( $image_meta = @wp_read_image_metadata($file) ) {
-		if ( trim( $image_meta['title'] ) && ! is_numeric( sanitize_title( $image_meta['title'] ) ) )
+	if ( preg_match( '#^audio#', $type ) ) {
+		$meta = wp_read_audio_metadata( $file );
+
+		if ( ! empty( $meta['title'] ) ) {
+			$title = $meta['title'];
+		}
+
+		if ( ! empty( $title ) ) {
+
+			if ( ! empty( $meta['album'] ) && ! empty( $meta['artist'] ) ) {
+				/* translators: 1: audio track title, 2: album title, 3: artist name */
+				$content .= sprintf( __( '"%1$s" from %2$s by %3$s.' ), $title, $meta['album'], $meta['artist'] );
+			} elseif ( ! empty( $meta['album'] ) ) {
+				/* translators: 1: audio track title, 2: album title */
+				$content .= sprintf( __( '"%1$s" from %2$s.' ), $title, $meta['album'] );
+			} elseif ( ! empty( $meta['artist'] ) ) {
+				/* translators: 1: audio track title, 2: artist name */
+				$content .= sprintf( __( '"%1$s" by %2$s.' ), $title, $meta['artist'] );
+			} else {
+				$content .= sprintf( __( '"%s".' ), $title );
+			}
+
+		} elseif ( ! empty( $meta['album'] ) ) {
+
+			if ( ! empty( $meta['artist'] ) ) {
+				/* translators: 1: audio album title, 2: artist name */
+				$content .= sprintf( __( '%1$s by %2$s.' ), $meta['album'], $meta['artist'] );
+			} else {
+				$content .= $meta['album'] . '.';
+			}
+
+		} elseif ( ! empty( $meta['artist'] ) ) {
+
+			$content .= $meta['artist'] . '.';
+
+		}
+
+		if ( ! empty( $meta['year'] ) )
+			$content .= ' ' . sprintf( __( 'Released: %d.' ), $meta['year'] );
+
+		if ( ! empty( $meta['track_number'] ) ) {
+			$track_number = explode( '/', $meta['track_number'] );
+			if ( isset( $track_number[1] ) )
+				$content .= ' ' . sprintf( __( 'Track %1$s of %2$s.' ), number_format_i18n( $track_number[0] ), number_format_i18n( $track_number[1] ) );
+			else
+				$content .= ' ' . sprintf( __( 'Track %1$s.' ), number_format_i18n( $track_number[0] ) );
+		}
+
+		if ( ! empty( $meta['genre'] ) )
+			$content .= ' ' . sprintf( __( 'Genre: %s.' ), $meta['genre'] );
+
+	// Use image exif/iptc data for title and caption defaults if possible.
+	} elseif ( 0 === strpos( $type, 'image/' ) && $image_meta = @wp_read_image_metadata( $file ) ) {
+		if ( trim( $image_meta['title'] ) && ! is_numeric( sanitize_title( $image_meta['title'] ) ) ) {
 			$title = $image_meta['title'];
-		if ( trim( $image_meta['caption'] ) )
-			$content = $image_meta['caption'];
+		}
+
+		if ( trim( $image_meta['caption'] ) ) {
+			$excerpt = $image_meta['caption'];
+		}
 	}
 
 	// Construct the attachment array
@@ -235,11 +363,11 @@ function media_handle_upload($file_id, $post_id, $post_data = array(), $override
 		'post_parent' => $post_id,
 		'post_title' => $title,
 		'post_content' => $content,
+		'post_excerpt' => $excerpt,
 	), $post_data );
 
 	// This should never be set as it would then overwrite an existing attachment.
-	if ( isset( $attachment['ID'] ) )
-		unset( $attachment['ID'] );
+	unset( $attachment['ID'] );
 
 	// Save the data
 	$id = wp_insert_attachment($attachment, $file, $post_id);
@@ -252,20 +380,26 @@ function media_handle_upload($file_id, $post_id, $post_data = array(), $override
 }
 
 /**
- * This handles a sideloaded file in the same way as an uploaded file is handled by {@link media_handle_upload()}
+ * Handles a side-loaded file in the same way as an uploaded file is handled by media_handle_upload().
  *
  * @since 2.6.0
  *
- * @param array $file_array Array similar to a {@link $_FILES} upload array
- * @param int $post_id The post ID the media is associated with
- * @param string $desc Description of the sideloaded file
- * @param array $post_data allows you to overwrite some of the attachment
- * @return int|object The ID of the attachment or a WP_Error on failure
+ * @param array  $file_array Array similar to a `$_FILES` upload array.
+ * @param int    $post_id    The post ID the media is associated with.
+ * @param string $desc       Optional. Description of the side-loaded file. Default null.
+ * @param array  $post_data  Optional. Post data to override. Default empty array.
+ * @return int|object The ID of the attachment or a WP_Error on failure.
  */
-function media_handle_sideload($file_array, $post_id, $desc = null, $post_data = array()) {
+function media_handle_sideload( $file_array, $post_id, $desc = null, $post_data = array() ) {
 	$overrides = array('test_form'=>false);
 
-	$file = wp_handle_sideload($file_array, $overrides);
+	$time = current_time( 'mysql' );
+	if ( $post = get_post( $post_id ) ) {
+		if ( substr( $post->post_date, 0, 4 ) > 0 )
+			$time = $post->post_date;
+	}
+
+	$file = wp_handle_sideload( $file_array, $overrides, $time );
 	if ( isset($file['error']) )
 		return new WP_Error( 'upload_error', $file['error'] );
 
@@ -275,7 +409,7 @@ function media_handle_sideload($file_array, $post_id, $desc = null, $post_data =
 	$title = preg_replace('/\.[^.]+$/', '', basename($file));
 	$content = '';
 
-	// use image exif/iptc data for title and caption defaults if possible
+	// Use image exif/iptc data for title and caption defaults if possible.
 	if ( $image_meta = @wp_read_image_metadata($file) ) {
 		if ( trim( $image_meta['title'] ) && ! is_numeric( sanitize_title( $image_meta['title'] ) ) )
 			$title = $image_meta['title'];
@@ -286,7 +420,7 @@ function media_handle_sideload($file_array, $post_id, $desc = null, $post_data =
 	if ( isset( $desc ) )
 		$title = $desc;
 
-	// Construct the attachment array
+	// Construct the attachment array.
 	$attachment = array_merge( array(
 		'post_mime_type' => $type,
 		'guid' => $url,
@@ -296,8 +430,7 @@ function media_handle_sideload($file_array, $post_id, $desc = null, $post_data =
 	), $post_data );
 
 	// This should never be set as it would then overwrite an existing attachment.
-	if ( isset( $attachment['ID'] ) )
-		unset( $attachment['ID'] );
+	unset( $attachment['ID'] );
 
 	// Save the attachment metadata
 	$id = wp_insert_attachment($attachment, $file, $post_id);
@@ -308,14 +441,13 @@ function media_handle_sideload($file_array, $post_id, $desc = null, $post_data =
 }
 
 /**
- * {@internal Missing Short Description}}
- *
- * Wrap iframe content (produced by $content_func) in a doctype, html head/body
- * etc any additional function args will be passed to content_func.
+ * Adds the iframe to display content for the media upload page
  *
  * @since 2.5.0
  *
- * @param unknown_type $content_func
+ * @global int $body_id
+ *
+ * @param string|callable $content_func
  */
 function wp_iframe($content_func /* ... */) {
 	_wp_admin_html_begin();
@@ -327,31 +459,66 @@ wp_enqueue_style( 'colors' );
 // Check callback name for 'media'
 if ( ( is_array( $content_func ) && ! empty( $content_func[1] ) && 0 === strpos( (string) $content_func[1], 'media' ) )
 	|| ( ! is_array( $content_func ) && 0 === strpos( $content_func, 'media' ) ) )
-	wp_enqueue_style( 'media' );
+	wp_enqueue_style( 'deprecated-media' );
 wp_enqueue_style( 'ie' );
 ?>
 <script type="text/javascript">
-//<![CDATA[
 addLoadEvent = function(func){if(typeof jQuery!="undefined")jQuery(document).ready(func);else if(typeof wpOnload!='function'){wpOnload=func;}else{var oldonload=wpOnload;wpOnload=function(){oldonload();func();}}};
-var userSettings = {'url':'<?php echo SITECOOKIEPATH; ?>','uid':'<?php if ( ! isset($current_user) ) $current_user = wp_get_current_user(); echo $current_user->ID; ?>','time':'<?php echo time(); ?>'};
-var ajaxurl = '<?php echo admin_url('admin-ajax.php'); ?>', pagenow = 'media-upload-popup', adminpage = 'media-upload-popup',
+var ajaxurl = '<?php echo admin_url( 'admin-ajax.php', 'relative' ); ?>', pagenow = 'media-upload-popup', adminpage = 'media-upload-popup',
 isRtl = <?php echo (int) is_rtl(); ?>;
-//]]>
 </script>
 <?php
-do_action('admin_enqueue_scripts', 'media-upload-popup');
-do_action('admin_print_styles-media-upload-popup');
-do_action('admin_print_styles');
-do_action('admin_print_scripts-media-upload-popup');
-do_action('admin_print_scripts');
-do_action('admin_head-media-upload-popup');
-do_action('admin_head');
-
-if ( is_string($content_func) )
+	/** This action is documented in wp-admin/admin-header.php */
+	do_action( 'admin_enqueue_scripts', 'media-upload-popup' );
+
+	/**
+	 * Fires when admin styles enqueued for the legacy (pre-3.5.0) media upload popup are printed.
+	 *
+	 * @since 2.9.0
+	 */
+	do_action( 'admin_print_styles-media-upload-popup' );
+
+	/** This action is documented in wp-admin/admin-header.php */
+	do_action( 'admin_print_styles' );
+
+	/**
+	 * Fires when admin scripts enqueued for the legacy (pre-3.5.0) media upload popup are printed.
+	 *
+	 * @since 2.9.0
+	 */
+	do_action( 'admin_print_scripts-media-upload-popup' );
+
+	/** This action is documented in wp-admin/admin-header.php */
+	do_action( 'admin_print_scripts' );
+
+	/**
+	 * Fires when scripts enqueued for the admin header for the legacy (pre-3.5.0)
+	 * media upload popup are printed.
+	 *
+	 * @since 2.9.0
+	 */
+	do_action( 'admin_head-media-upload-popup' );
+
+	/** This action is documented in wp-admin/admin-header.php */
+	do_action( 'admin_head' );
+
+if ( is_string( $content_func ) ) {
+	/**
+	 * Fires in the admin header for each specific form tab in the legacy
+	 * (pre-3.5.0) media upload popup.
+	 *
+	 * The dynamic portion of the hook, `$content_func`, refers to the form
+	 * callback for the media upload type. Possible values include
+	 * 'media_upload_type_form', 'media_upload_type_url_form', and
+	 * 'media_upload_library_form'.
+	 *
+	 * @since 2.5.0
+	 */
 	do_action( "admin_head_{$content_func}" );
+}
 ?>
 </head>
-<body<?php if ( isset($GLOBALS['body_id']) ) echo ' id="' . $GLOBALS['body_id'] . '"'; ?> class="no-js">
+<body<?php if ( isset($GLOBALS['body_id']) ) echo ' id="' . $GLOBALS['body_id'] . '"'; ?> class="wp-core-ui no-js">
 <script type="text/javascript">
 document.body.className = document.body.className.replace('no-js', 'js');
 </script>
@@ -360,7 +527,8 @@ document.body.className = document.body.className.replace('no-js', 'js');
 	$args = array_slice($args, 1);
 	call_user_func_array($content_func, $args);
 
-	do_action('admin_print_footer_scripts');
+	/** This action is documented in wp-admin/admin-footer.php */
+	do_action( 'admin_print_footer_scripts' );
 ?>
 <script type="text/javascript">if(typeof wpOnload=='function')wpOnload();</script>
 </body>
@@ -369,43 +537,99 @@ document.body.className = document.body.className.replace('no-js', 'js');
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Adds the media button to the editor
  *
  * @since 2.5.0
+ *
+ * @global int $post_ID
+ *
+ * @staticvar int $instance
+ *
+ * @param string $editor_id
  */
 function media_buttons($editor_id = 'content') {
-	$context = apply_filters('media_buttons_context', __('Upload/Insert %s'));
+	static $instance = 0;
+	$instance++;
 
-	$img = '<img src="' . esc_url( admin_url( 'images/media-button.png?ver=20111005' ) ) . '" width="15" height="15" />';
+	$post = get_post();
+	if ( ! $post && ! empty( $GLOBALS['post_ID'] ) )
+		$post = $GLOBALS['post_ID'];
 
-	echo '<a href="' . esc_url( get_upload_iframe_src() ) . '" class="thickbox add_media" id="' . esc_attr( $editor_id ) . '-add_media" title="' . esc_attr__( 'Add Media' ) . '" onclick="return false;">' . sprintf( $context, $img ) . '</a>';
-}
-add_action( 'media_buttons', 'media_buttons' );
+	wp_enqueue_media( array(
+		'post' => $post
+	) );
 
-function _media_button($title, $icon, $type, $id) {
-	return "<a href='" . esc_url( get_upload_iframe_src($type) ) . "' id='{$id}-add_{$type}' class='thickbox add_$type' title='" . esc_attr( $title ) . "'><img src='" . esc_url( admin_url( $icon ) ) . "' alt='$title' onclick='return false;' /></a>";
+	$img = '<span class="wp-media-buttons-icon"></span> ';
+
+	$id_attribute = $instance === 1 ? ' id="insert-media-button"' : '';
+	printf( '<button type="button"%s class="button insert-media add_media" data-editor="%s">%s</button>',
+		$id_attribute,
+		esc_attr( $editor_id ),
+		$img . __( 'Add Media' )
+	);
+	/**
+	 * Filters the legacy (pre-3.5.0) media buttons.
+	 *
+	 * Use {@see 'media_buttons'} action instead.
+	 *
+	 * @since 2.5.0
+	 * @deprecated 3.5.0 Use {@see 'media_buttons'} action instead.
+	 *
+	 * @param string $string Media buttons context. Default empty.
+	 */
+	$legacy_filter = apply_filters( 'media_buttons_context', '' );
+
+	if ( $legacy_filter ) {
+		// #WP22559. Close <a> if a plugin started by closing <a> to open their own <a> tag.
+		if ( 0 === stripos( trim( $legacy_filter ), '</a>' ) )
+			$legacy_filter .= '</a>';
+		echo $legacy_filter;
+	}
 }
 
-function get_upload_iframe_src( $type = null ) {
+/**
+ *
+ * @global int $post_ID
+ * @param string $type
+ * @param int $post_id
+ * @param string $tab
+ * @return string
+ */
+function get_upload_iframe_src( $type = null, $post_id = null, $tab = null ) {
 	global $post_ID;
 
-	$uploading_iframe_ID = (int) $post_ID;
-	$upload_iframe_src = add_query_arg( 'post_id', $uploading_iframe_ID, admin_url('media-upload.php') );
+	if ( empty( $post_id ) )
+		$post_id = $post_ID;
+
+	$upload_iframe_src = add_query_arg( 'post_id', (int) $post_id, admin_url('media-upload.php') );
 
 	if ( $type && 'media' != $type )
 		$upload_iframe_src = add_query_arg('type', $type, $upload_iframe_src);
 
-	$upload_iframe_src = apply_filters($type . '_upload_iframe_src', $upload_iframe_src);
+	if ( ! empty( $tab ) )
+		$upload_iframe_src = add_query_arg('tab', $tab, $upload_iframe_src);
+
+	/**
+	 * Filters the upload iframe source URL for a specific media type.
+	 *
+	 * The dynamic portion of the hook name, `$type`, refers to the type
+	 * of media uploaded.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $upload_iframe_src The upload iframe source URL by type.
+	 */
+	$upload_iframe_src = apply_filters( $type . '_upload_iframe_src', $upload_iframe_src );
 
 	return add_query_arg('TB_iframe', true, $upload_iframe_src);
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Handles form submissions for the legacy media uploader.
  *
  * @since 2.5.0
  *
- * @return unknown
+ * @return mixed void|object WP_Error on failure
  */
 function media_upload_form_handler() {
 	check_admin_referer('media-form');
@@ -413,15 +637,14 @@ function media_upload_form_handler() {
 	$errors = null;
 
 	if ( isset($_POST['send']) ) {
-		$keys = array_keys($_POST['send']);
-		$send_id = (int) array_shift($keys);
+		$keys = array_keys( $_POST['send'] );
+		$send_id = (int) reset( $keys );
 	}
 
 	if ( !empty($_POST['attachments']) ) foreach ( $_POST['attachments'] as $attachment_id => $attachment ) {
 		$post = $_post = get_post($attachment_id, ARRAY_A);
-		$post_type_object = get_post_type_object( $post[ 'post_type' ] );
 
-		if ( !current_user_can( $post_type_object->cap->edit_post, $attachment_id ) )
+		if ( !current_user_can( 'edit_post', $attachment_id ) )
 			continue;
 
 		if ( isset($attachment['post_content']) )
@@ -438,14 +661,25 @@ function media_upload_form_handler() {
 				$post['post_parent'] = $attachment['post_parent'];
 		}
 
-		$post = apply_filters('attachment_fields_to_save', $post, $attachment);
+		/**
+		 * Filters the attachment fields to be saved.
+		 *
+		 * @since 2.5.0
+		 *
+		 * @see wp_get_attachment_metadata()
+		 *
+		 * @param array $post       An array of post data.
+		 * @param array $attachment An array of attachment metadata.
+		 */
+		$post = apply_filters( 'attachment_fields_to_save', $post, $attachment );
 
 		if ( isset($attachment['image_alt']) ) {
-			$image_alt = get_post_meta($attachment_id, '_wp_attachment_image_alt', true);
-			if ( $image_alt != stripslashes($attachment['image_alt']) ) {
-				$image_alt = wp_strip_all_tags( stripslashes($attachment['image_alt']), true );
-				// update_meta expects slashed
-				update_post_meta( $attachment_id, '_wp_attachment_image_alt', addslashes($image_alt) );
+			$image_alt = wp_unslash( $attachment['image_alt'] );
+			if ( $image_alt != get_post_meta($attachment_id, '_wp_attachment_image_alt', true) ) {
+				$image_alt = wp_strip_all_tags( $image_alt, true );
+
+				// Update_meta expects slashed.
+				update_post_meta( $attachment_id, '_wp_attachment_image_alt', wp_slash( $image_alt ) );
 			}
 		}
 
@@ -465,19 +699,17 @@ function media_upload_form_handler() {
 
 	if ( isset($_POST['insert-gallery']) || isset($_POST['update-gallery']) ) { ?>
 		<script type="text/javascript">
-		/* <![CDATA[ */
 		var win = window.dialogArguments || opener || parent || top;
 		win.tb_remove();
-		/* ]]> */
 		</script>
 		<?php
 		exit;
 	}
 
 	if ( isset($send_id) ) {
-		$attachment = stripslashes_deep( $_POST['attachments'][$send_id] );
+		$attachment = wp_unslash( $_POST['attachments'][$send_id] );
 
-		$html = $attachment['post_title'];
+		$html = isset( $attachment['post_title'] ) ? $attachment['post_title'] : '';
 		if ( !empty($attachment['url']) ) {
 			$rel = '';
 			if ( strpos($attachment['url'], 'attachment_id') || get_attachment_link($send_id) == $attachment['url'] )
@@ -485,7 +717,18 @@ function media_upload_form_handler() {
 			$html = "<a href='{$attachment['url']}'$rel>$html</a>";
 		}
 
-		$html = apply_filters('media_send_to_editor', $html, $send_id, $attachment);
+		/**
+		 * Filters the HTML markup for a media item sent to the editor.
+		 *
+		 * @since 2.5.0
+		 *
+		 * @see wp_get_attachment_metadata()
+		 *
+		 * @param string $html       HTML markup for a media item sent to the editor.
+		 * @param int    $send_id    The first key from the $_POST['send'] data.
+		 * @param array  $attachment Array of attachment metadata.
+		 */
+		$html = apply_filters( 'media_send_to_editor', $html, $send_id, $attachment );
 		return media_send_to_editor($html);
 	}
 
@@ -493,15 +736,13 @@ function media_upload_form_handler() {
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Handles the process of uploading media.
  *
  * @since 2.5.0
  *
- * @return unknown
+ * @return null|string
  */
 function wp_media_upload_handler() {
-	global $is_iphone;
-
 	$errors = array();
 	$id = 0;
 
@@ -522,7 +763,7 @@ function wp_media_upload_handler() {
 			$src = "http://$src";
 
 		if ( isset( $_POST['media_type'] ) && 'image' != $_POST['media_type'] ) {
-			$title = esc_html( stripslashes( $_POST['title'] ) );
+			$title = esc_html( wp_unslash( $_POST['title'] ) );
 			if ( empty( $title ) )
 				$title = esc_html( basename( $src ) );
 
@@ -534,24 +775,52 @@ function wp_media_upload_handler() {
 				&& ( 'audio' == $ext_type || 'video' == $ext_type ) )
 					$type = $ext_type;
 
+			/**
+			 * Filters the URL sent to the editor for a specific media type.
+			 *
+			 * The dynamic portion of the hook name, `$type`, refers to the type
+			 * of media being sent.
+			 *
+			 * @since 3.3.0
+			 *
+			 * @param string $html  HTML markup sent to the editor.
+			 * @param string $src   Media source URL.
+			 * @param string $title Media title.
+			 */
 			$html = apply_filters( $type . '_send_to_editor_url', $html, esc_url_raw( $src ), $title );
 		} else {
 			$align = '';
-			$alt = esc_attr( stripslashes( $_POST['alt'] ) );
+			$alt = esc_attr( wp_unslash( $_POST['alt'] ) );
 			if ( isset($_POST['align']) ) {
-				$align = esc_attr( stripslashes( $_POST['align'] ) );
+				$align = esc_attr( wp_unslash( $_POST['align'] ) );
 				$class = " class='align$align'";
 			}
 			if ( !empty($src) )
 				$html = "<img src='" . esc_url($src) . "' alt='$alt'$class />";
 
+			/**
+			 * Filters the image URL sent to the editor.
+			 *
+			 * @since 2.8.0
+			 *
+			 * @param string $html  HTML markup sent to the editor for an image.
+			 * @param string $src   Image source URL.
+			 * @param string $alt   Image alternate, or alt, text.
+			 * @param string $align The image alignment. Default 'alignnone'. Possible values include
+			 *                      'alignleft', 'aligncenter', 'alignright', 'alignnone'.
+			 */
 			$html = apply_filters( 'image_send_to_editor_url', $html, esc_url_raw( $src ), $alt, $align );
 		}
 
 		return media_send_to_editor($html);
 	}
 
-	if ( !empty($_POST) ) {
+	if ( isset( $_POST['save'] ) ) {
+		$errors['upload_notice'] = __('Saved.');
+		wp_enqueue_script( 'admin-gallery' );
+ 		return wp_iframe( 'media_upload_gallery_form', $errors );
+
+	} elseif ( ! empty( $_POST ) ) {
 		$return = media_upload_form_handler();
 
 		if ( is_string($return) )
@@ -560,11 +829,6 @@ function wp_media_upload_handler() {
 			$errors = $return;
 	}
 
-	if ( isset($_POST['save']) ) {
-		$errors['upload_notice'] = __('Saved.');
-		return media_upload_gallery();
-	}
-
 	if ( isset($_GET['tab']) && $_GET['tab'] == 'type_url' ) {
 		$type = 'image';
 		if ( isset( $_GET['type'] ) && in_array( $_GET['type'], array( 'video', 'audio', 'file' ) ) )
@@ -572,64 +836,73 @@ function wp_media_upload_handler() {
 		return wp_iframe( 'media_upload_type_url_form', $type, $errors, $id );
 	}
 
-	if ( $is_iphone )
-		return wp_iframe( 'media_upload_type_url_form', 'image', $errors, $id );
-	else
-		return wp_iframe( 'media_upload_type_form', 'image', $errors, $id );
+	return wp_iframe( 'media_upload_type_form', 'image', $errors, $id );
 }
 
 /**
- * Download an image from the specified URL and attach it to a post.
+ * Downloads an image from the specified URL and attaches it to a post.
  *
  * @since 2.6.0
+ * @since 4.2.0 Introduced the `$return` parameter.
  *
- * @param string $file The URL of the image to download
- * @param int $post_id The post ID the media is to be associated with
- * @param string $desc Optional. Description of the image
- * @return string|WP_Error Populated HTML img tag on success
+ * @param string $file    The URL of the image to download.
+ * @param int    $post_id The post ID the media is to be associated with.
+ * @param string $desc    Optional. Description of the image.
+ * @param string $return  Optional. Accepts 'html' (image tag html) or 'src' (URL). Default 'html'.
+ * @return string|WP_Error Populated HTML img tag on success, WP_Error object otherwise.
  */
-function media_sideload_image($file, $post_id, $desc = null) {
-	if ( ! empty($file) ) {
-		// Download file to temp location
-		$tmp = download_url( $file );
-
-		// Set variables for storage
-		// fix file filename for query strings
-		preg_match('/[^\?]+\.(jpg|JPG|jpe|JPE|jpeg|JPEG|gif|GIF|png|PNG)/', $file, $matches);
-		$file_array['name'] = basename($matches[0]);
-		$file_array['tmp_name'] = $tmp;
-
-		// If error storing temporarily, unlink
-		if ( is_wp_error( $tmp ) ) {
-			@unlink($file_array['tmp_name']);
-			$file_array['tmp_name'] = '';
+function media_sideload_image( $file, $post_id, $desc = null, $return = 'html' ) {
+	if ( ! empty( $file ) ) {
+
+		// Set variables for storage, fix file filename for query strings.
+		preg_match( '/[^\?]+\.(jpe?g|jpe|gif|png)\b/i', $file, $matches );
+		if ( ! $matches ) {
+			return new WP_Error( 'image_sideload_failed', __( 'Invalid image URL' ) );
+		}
+
+		$file_array = array();
+		$file_array['name'] = basename( $matches[0] );
+
+		// Download file to temp location.
+		$file_array['tmp_name'] = download_url( $file );
+
+		// If error storing temporarily, return the error.
+		if ( is_wp_error( $file_array['tmp_name'] ) ) {
+			return $file_array['tmp_name'];
 		}
 
-		// do the validation and storage stuff
+		// Do the validation and storage stuff.
 		$id = media_handle_sideload( $file_array, $post_id, $desc );
-		// If error storing permanently, unlink
-		if ( is_wp_error($id) ) {
-			@unlink($file_array['tmp_name']);
+
+		// If error storing permanently, unlink.
+		if ( is_wp_error( $id ) ) {
+			@unlink( $file_array['tmp_name'] );
 			return $id;
 		}
 
 		$src = wp_get_attachment_url( $id );
 	}
 
-	// Finally check to make sure the file has been saved, then return the html
-	if ( ! empty($src) ) {
-		$alt = isset($desc) ? esc_attr($desc) : '';
+	// Finally, check to make sure the file has been saved, then return the HTML.
+	if ( ! empty( $src ) ) {
+		if ( $return === 'src' ) {
+			return $src;
+		}
+
+		$alt = isset( $desc ) ? esc_attr( $desc ) : '';
 		$html = "<img src='$src' alt='$alt' />";
 		return $html;
+	} else {
+		return new WP_Error( 'image_sideload_failed' );
 	}
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Retrieves the legacy media uploader form in an iframe.
  *
  * @since 2.5.0
  *
- * @return unknown
+ * @return string|null
  */
 function media_upload_gallery() {
 	$errors = array();
@@ -648,11 +921,11 @@ function media_upload_gallery() {
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Retrieves the legacy media library form in an iframe.
  *
  * @since 2.5.0
  *
- * @return unknown
+ * @return string|null
  */
 function media_upload_library() {
 	$errors = array();
@@ -673,9 +946,9 @@ function media_upload_library() {
  *
  * @since 2.7.0
  *
- * @param unknown_type $post
- * @param unknown_type $checked
- * @return unknown
+ * @param WP_Post $post
+ * @param string $checked
+ * @return string
  */
 function image_align_input_fields( $post, $checked = '' ) {
 
@@ -690,7 +963,7 @@ function image_align_input_fields( $post, $checked = '' ) {
 	foreach ( $alignments as $name => $label ) {
 		$name = esc_attr($name);
 		$out[] = "<input type='radio' name='attachments[{$post->ID}][align]' id='image-align-{$name}-{$post->ID}' value='$name'".
-		 	( $checked == $name ? " checked='checked'" : "" ) .
+			( $checked == $name ? " checked='checked'" : "" ) .
 			" /><label for='image-align-{$name}-{$post->ID}' class='align image-align-{$name}-label'>$label</label>";
 	}
 	return join("\n", $out);
@@ -701,54 +974,73 @@ function image_align_input_fields( $post, $checked = '' ) {
  *
  * @since 2.7.0
  *
- * @param unknown_type $post
- * @param unknown_type $check
- * @return unknown
+ * @param WP_Post $post
+ * @param bool|string $check
+ * @return array
  */
 function image_size_input_fields( $post, $check = '' ) {
+	/**
+	 * Filters the names and labels of the default image sizes.
+	 *
+	 * @since 3.3.0
+	 *
+	 * @param array $size_names Array of image sizes and their names. Default values
+	 *                          include 'Thumbnail', 'Medium', 'Large', 'Full Size'.
+	 */
+	$size_names = apply_filters( 'image_size_names_choose', array(
+		'thumbnail' => __( 'Thumbnail' ),
+		'medium'    => __( 'Medium' ),
+		'large'     => __( 'Large' ),
+		'full'      => __( 'Full Size' )
+	) );
+
+	if ( empty( $check ) ) {
+		$check = get_user_setting('imgsize', 'medium');
+	}
+	$out = array();
 
-		// get a list of the actual pixel dimensions of each possible intermediate version of this image
-		$size_names = apply_filters( 'image_size_names_choose', array('thumbnail' => __('Thumbnail'), 'medium' => __('Medium'), 'large' => __('Large'), 'full' => __('Full Size')) );
-
-		if ( empty($check) )
-			$check = get_user_setting('imgsize', 'medium');
-
-		foreach ( $size_names as $size => $label ) {
-			$downsize = image_downsize($post->ID, $size);
-			$checked = '';
-
-			// is this size selectable?
-			$enabled = ( $downsize[3] || 'full' == $size );
-			$css_id = "image-size-{$size}-{$post->ID}";
-			// if this size is the default but that's not available, don't select it
-			if ( $size == $check ) {
-				if ( $enabled )
-					$checked = " checked='checked'";
-				else
-					$check = '';
-			} elseif ( !$check && $enabled && 'thumbnail' != $size ) {
-				// if $check is not enabled, default to the first available size that's bigger than a thumbnail
-				$check = $size;
+	foreach ( $size_names as $size => $label ) {
+		$downsize = image_downsize( $post->ID, $size );
+		$checked = '';
+
+		// Is this size selectable?
+		$enabled = ( $downsize[3] || 'full' == $size );
+		$css_id = "image-size-{$size}-{$post->ID}";
+
+		// If this size is the default but that's not available, don't select it.
+		if ( $size == $check ) {
+			if ( $enabled ) {
 				$checked = " checked='checked'";
+			} else {
+				$check = '';
 			}
+		} elseif ( ! $check && $enabled && 'thumbnail' != $size ) {
+			/*
+			 * If $check is not enabled, default to the first available size
+			 * that's bigger than a thumbnail.
+			 */
+			$check = $size;
+			$checked = " checked='checked'";
+		}
 
-			$html = "<div class='image-size-item'><input type='radio' " . disabled( $enabled, false, false ) . "name='attachments[$post->ID][image-size]' id='{$css_id}' value='{$size}'$checked />";
-
-			$html .= "<label for='{$css_id}'>$label</label>";
-			// only show the dimensions if that choice is available
-			if ( $enabled )
-				$html .= " <label for='{$css_id}' class='help'>" . sprintf( "(%d&nbsp;&times;&nbsp;%d)", $downsize[1], $downsize[2] ). "</label>";
+		$html = "<div class='image-size-item'><input type='radio' " . disabled( $enabled, false, false ) . "name='attachments[$post->ID][image-size]' id='{$css_id}' value='{$size}'$checked />";
 
-			$html .= '</div>';
+		$html .= "<label for='{$css_id}'>$label</label>";
 
-			$out[] = $html;
+		// Only show the dimensions if that choice is available.
+		if ( $enabled ) {
+			$html .= " <label for='{$css_id}' class='help'>" . sprintf( "(%d&nbsp;&times;&nbsp;%d)", $downsize[1], $downsize[2] ). "</label>";
 		}
+		$html .= '</div>';
 
-		return array(
-			'label' => __('Size'),
-			'input' => 'html',
-			'html'  => join("\n", $out),
-		);
+		$out[] = $html;
+	}
+
+	return array(
+		'label' => __( 'Size' ),
+		'input' => 'html',
+		'html'  => join( "\n", $out ),
+	);
 }
 
 /**
@@ -756,9 +1048,9 @@ function image_size_input_fields( $post, $check = '' ) {
  *
  * @since 2.7.0
  *
- * @param unknown_type $post
- * @param unknown_type $url_type
- * @return unknown
+ * @param WP_Post $post
+ * @param string $url_type
+ * @return string
  */
 function image_link_input_fields($post, $url_type = '') {
 
@@ -776,59 +1068,48 @@ function image_link_input_fields($post, $url_type = '') {
 
 	return "
 	<input type='text' class='text urlfield' name='attachments[$post->ID][url]' value='" . esc_attr($url) . "' /><br />
-	<button type='button' class='button urlnone' title=''>" . __('None') . "</button>
-	<button type='button' class='button urlfile' title='" . esc_attr($file) . "'>" . __('File URL') . "</button>
-	<button type='button' class='button urlpost' title='" . esc_attr($link) . "'>" . __('Attachment Post URL') . "</button>
+	<button type='button' class='button urlnone' data-link-url=''>" . __('None') . "</button>
+	<button type='button' class='button urlfile' data-link-url='" . esc_attr($file) . "'>" . __('File URL') . "</button>
+	<button type='button' class='button urlpost' data-link-url='" . esc_attr($link) . "'>" . __('Attachment Post URL') . "</button>
 ";
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Output a textarea element for inputting an attachment caption.
  *
- * @since 2.5.0
+ * @since 3.4.0
  *
- * @param unknown_type $form_fields
- * @param unknown_type $post
- * @return unknown
+ * @param WP_Post $edit_post Attachment WP_Post object.
+ * @return string HTML markup for the textarea element.
  */
-function image_attachment_fields_to_edit($form_fields, $post) {
-	if ( substr($post->post_mime_type, 0, 5) == 'image' ) {
-		$alt = get_post_meta($post->ID, '_wp_attachment_image_alt', true);
-		if ( empty($alt) )
-			$alt = '';
-
-		$form_fields['post_title']['required'] = true;
-
-		$form_fields['image_alt'] = array(
-			'value' => $alt,
-			'label' => __('Alternate Text'),
-			'helps' => __('Alt text for the image, e.g. &#8220;The Mona Lisa&#8221;')
-		);
-
-		$form_fields['align'] = array(
-			'label' => __('Alignment'),
-			'input' => 'html',
-			'html'  => image_align_input_fields($post, get_option('image_default_align')),
-		);
+function wp_caption_input_textarea($edit_post) {
+	// Post data is already escaped.
+	$name = "attachments[{$edit_post->ID}][post_excerpt]";
 
-		$form_fields['image-size'] = image_size_input_fields( $post, get_option('image_default_size', 'medium') );
+	return '<textarea name="' . $name . '" id="' . $name . '">' . $edit_post->post_excerpt . '</textarea>';
+}
 
-	} else {
-		unset( $form_fields['image_alt'] );
-	}
+/**
+ * Retrieves the image attachment fields to edit form fields.
+ *
+ * @since 2.5.0
+ *
+ * @param array $form_fields
+ * @param object $post
+ * @return array
+ */
+function image_attachment_fields_to_edit($form_fields, $post) {
 	return $form_fields;
 }
 
-add_filter('attachment_fields_to_edit', 'image_attachment_fields_to_edit', 10, 2);
-
 /**
- * {@internal Missing Short Description}}
+ * Retrieves the single non-image attachment fields to edit form fields.
  *
  * @since 2.5.0
  *
- * @param unknown_type $form_fields
- * @param unknown_type $post
- * @return unknown
+ * @param array   $form_fields An array of attachment form fields.
+ * @param WP_Post $post        The WP_Post attachment object.
+ * @return array Filtered attachment form fields.
  */
 function media_single_attachment_fields_to_edit( $form_fields, $post ) {
 	unset($form_fields['url'], $form_fields['align'], $form_fields['image-size']);
@@ -836,13 +1117,13 @@ function media_single_attachment_fields_to_edit( $form_fields, $post ) {
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Retrieves the post non-image attachment fields to edito form fields.
  *
  * @since 2.8.0
  *
- * @param unknown_type $form_fields
- * @param unknown_type $post
- * @return unknown
+ * @param array   $form_fields An array of attachment form fields.
+ * @param WP_Post $post        The WP_Post attachment object.
+ * @return array Filtered attachment form fields.
  */
 function media_post_single_attachment_fields_to_edit( $form_fields, $post ) {
 	unset($form_fields['image_url']);
@@ -850,45 +1131,48 @@ function media_post_single_attachment_fields_to_edit( $form_fields, $post ) {
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Filters input from media_upload_form_handler() and assigns a default
+ * post_title from the file name if none supplied.
+ *
+ * Illustrates the use of the {@see 'attachment_fields_to_save'} filter
+ * which can be used to add default values to any field before saving to DB.
  *
  * @since 2.5.0
  *
- * @param unknown_type $post
- * @param unknown_type $attachment
- * @return unknown
+ * @param array $post       The WP_Post attachment object converted to an array.
+ * @param array $attachment An array of attachment metadata.
+ * @return array Filtered attachment post object.
  */
-function image_attachment_fields_to_save($post, $attachment) {
-	if ( substr($post['post_mime_type'], 0, 5) == 'image' ) {
-		if ( strlen(trim($post['post_title'])) == 0 ) {
-			$post['post_title'] = preg_replace('/\.\w+$/', '', basename($post['guid']));
-			$post['errors']['post_title']['errors'][] = __('Empty Title filled from filename.');
+function image_attachment_fields_to_save( $post, $attachment ) {
+	if ( substr( $post['post_mime_type'], 0, 5 ) == 'image' ) {
+		if ( strlen( trim( $post['post_title'] ) ) == 0 ) {
+			$attachment_url = ( isset( $post['attachment_url'] ) ) ? $post['attachment_url'] : $post['guid'];
+			$post['post_title'] = preg_replace( '/\.\w+$/', '', wp_basename( $attachment_url ) );
+			$post['errors']['post_title']['errors'][] = __( 'Empty Title filled from filename.' );
 		}
 	}
 
 	return $post;
 }
 
-add_filter('attachment_fields_to_save', 'image_attachment_fields_to_save', 10, 2);
-
 /**
- * {@internal Missing Short Description}}
+ * Retrieves the media element HTML to send to the editor.
  *
  * @since 2.5.0
  *
- * @param unknown_type $html
- * @param unknown_type $attachment_id
- * @param unknown_type $attachment
- * @return unknown
+ * @param string $html
+ * @param integer $attachment_id
+ * @param array $attachment
+ * @return string
  */
 function image_media_send_to_editor($html, $attachment_id, $attachment) {
-	$post =& get_post($attachment_id);
+	$post = get_post($attachment_id);
 	if ( substr($post->post_mime_type, 0, 5) == 'image' ) {
 		$url = $attachment['url'];
 		$align = !empty($attachment['align']) ? $attachment['align'] : 'none';
 		$size = !empty($attachment['image-size']) ? $attachment['image-size'] : 'medium';
 		$alt = !empty($attachment['image_alt']) ? $attachment['image_alt'] : '';
-		$rel = ( $url == get_attachment_link($attachment_id) );
+		$rel = ( strpos( $url, 'attachment_id') || $url === get_attachment_link( $attachment_id ) );
 
 		return get_image_send_to_editor($attachment_id, $attachment['post_excerpt'], $attachment['post_title'], $align, $url, $rel, $size, $alt);
 	}
@@ -896,29 +1180,25 @@ function image_media_send_to_editor($html, $attachment_id, $attachment) {
 	return $html;
 }
 
-add_filter('media_send_to_editor', 'image_media_send_to_editor', 10, 3);
-
 /**
- * {@internal Missing Short Description}}
+ * Retrieves the attachment fields to edit form fields.
  *
  * @since 2.5.0
  *
- * @param unknown_type $post
- * @param unknown_type $errors
- * @return unknown
+ * @param WP_Post $post
+ * @param array $errors
+ * @return array
  */
 function get_attachment_fields_to_edit($post, $errors = null) {
 	if ( is_int($post) )
-		$post =& get_post($post);
+		$post = get_post($post);
 	if ( is_array($post) )
-		$post = (object) $post;
+		$post = new WP_Post( (object) $post );
 
 	$image_url = wp_get_attachment_url($post->ID);
 
 	$edit_post = sanitize_post($post, 'edit');
 
-
-
 	$form_fields = array(
 		'post_title'   => array(
 			'label'      => __('Title'),
@@ -927,7 +1207,8 @@ function get_attachment_fields_to_edit($post, $errors = null) {
 		'image_alt'   => array(),
 		'post_excerpt' => array(
 			'label'      => __('Caption'),
-			'value'      => $edit_post->post_excerpt
+			'input'      => 'html',
+			'html'       => wp_caption_input_textarea($edit_post)
 		),
 		'post_content' => array(
 			'label'      => __('Description'),
@@ -955,7 +1236,7 @@ function get_attachment_fields_to_edit($post, $errors = null) {
 
 	foreach ( get_attachment_taxonomies($post) as $taxonomy ) {
 		$t = (array) get_taxonomy($taxonomy);
-		if ( ! $t['public'] )
+		if ( ! $t['public'] || ! $t['show_ui'] )
 			continue;
 		if ( empty($t['label']) )
 			$t['label'] = $taxonomy;
@@ -963,23 +1244,57 @@ function get_attachment_fields_to_edit($post, $errors = null) {
 			$t['args'] = array();
 
 		$terms = get_object_term_cache($post->ID, $taxonomy);
-		if ( empty($terms) )
+		if ( false === $terms )
 			$terms = wp_get_object_terms($post->ID, $taxonomy, $t['args']);
 
 		$values = array();
 
 		foreach ( $terms as $term )
-			$values[] = $term->name;
+			$values[] = $term->slug;
 		$t['value'] = join(', ', $values);
 
 		$form_fields[$taxonomy] = $t;
 	}
 
 	// Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default
-	// The recursive merge is easily traversed with array casting: foreach( (array) $things as $thing )
+	// The recursive merge is easily traversed with array casting: foreach ( (array) $things as $thing )
 	$form_fields = array_merge_recursive($form_fields, (array) $errors);
 
-	$form_fields = apply_filters('attachment_fields_to_edit', $form_fields, $post);
+	// This was formerly in image_attachment_fields_to_edit().
+	if ( substr($post->post_mime_type, 0, 5) == 'image' ) {
+		$alt = get_post_meta($post->ID, '_wp_attachment_image_alt', true);
+		if ( empty($alt) )
+			$alt = '';
+
+		$form_fields['post_title']['required'] = true;
+
+		$form_fields['image_alt'] = array(
+			'value' => $alt,
+			'label' => __('Alternative Text'),
+			'helps' => __('Alt text for the image, e.g. &#8220;The Mona Lisa&#8221;')
+		);
+
+		$form_fields['align'] = array(
+			'label' => __('Alignment'),
+			'input' => 'html',
+			'html'  => image_align_input_fields($post, get_option('image_default_align')),
+		);
+
+		$form_fields['image-size'] = image_size_input_fields( $post, get_option('image_default_size', 'medium') );
+
+	} else {
+		unset( $form_fields['image_alt'] );
+	}
+
+	/**
+	 * Filters the attachment fields to edit.
+	 *
+	 * @since 2.5.0
+	 *
+	 * @param array   $form_fields An array of attachment form fields.
+	 * @param WP_Post $post        The WP_Post attachment object.
+	 */
+	$form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post );
 
 	return $form_fields;
 }
@@ -993,6 +1308,8 @@ function get_attachment_fields_to_edit($post, $errors = null) {
  *
  * @since 2.5.0
  *
+ * @global WP_Query $wp_the_query
+ *
  * @param int $post_id Optional. Post ID.
  * @param array $errors Errors for attachment, if any.
  * @return string
@@ -1027,6 +1344,8 @@ function get_media_items( $post_id, $errors ) {
  *
  * @since 2.5.0
  *
+ * @global string $redir_tab
+ *
  * @param int $attachment_id Attachment ID for modification.
  * @param string|array $args Optional. Override defaults.
  * @return string HTML form for attachment.
@@ -1042,32 +1361,42 @@ function get_media_item( $attachment_id, $args = null ) {
 	$post = get_post( $attachment_id );
 	$current_post_id = !empty( $_GET['post_id'] ) ? (int) $_GET['post_id'] : 0;
 
-	$default_args = array( 'errors' => null, 'send' => $current_post_id ? post_type_supports( get_post_type( $current_post_id ), 'editor' ) : true, 'delete' => true, 'toggle' => true, 'show_title' => true );
+	$default_args = array(
+		'errors' => null,
+		'send' => $current_post_id ? post_type_supports( get_post_type( $current_post_id ), 'editor' ) : true,
+		'delete' => true,
+		'toggle' => true,
+		'show_title' => true
+	);
 	$args = wp_parse_args( $args, $default_args );
-	$args = apply_filters( 'get_media_item_args', $args );
-	extract( $args, EXTR_SKIP );
+
+	/**
+	 * Filters the arguments used to retrieve an image for the edit image form.
+	 *
+	 * @since 3.1.0
+	 *
+	 * @see get_media_item
+	 *
+	 * @param array $args An array of arguments.
+	 */
+	$r = apply_filters( 'get_media_item_args', $args );
 
 	$toggle_on  = __( 'Show' );
 	$toggle_off = __( 'Hide' );
 
-	$filename = esc_html( basename( $post->guid ) );
+	$file = get_attached_file( $post->ID );
+	$filename = esc_html( wp_basename( $file ) );
 	$title = esc_attr( $post->post_title );
 
-	if ( $_tags = get_the_tags( $attachment_id ) ) {
-		foreach ( $_tags as $tag )
-			$tags[] = $tag->name;
-		$tags = esc_attr( join( ', ', $tags ) );
-	}
-
 	$post_mime_types = get_post_mime_types();
 	$keys = array_keys( wp_match_mime_types( array_keys( $post_mime_types ), $post->post_mime_type ) );
-	$type = array_shift( $keys );
+	$type = reset( $keys );
 	$type_html = "<input type='hidden' id='type-of-$attachment_id' value='" . esc_attr( $type ) . "' />";
 
-	$form_fields = get_attachment_fields_to_edit( $post, $errors );
+	$form_fields = get_attachment_fields_to_edit( $post, $r['errors'] );
 
-	if ( $toggle ) {
-		$class = empty( $errors ) ? 'startclosed' : 'startopen';
+	if ( $r['toggle'] ) {
+		$class = empty( $r['errors'] ) ? 'startclosed' : 'startopen';
 		$toggle_links = "
 	<a class='toggle describe-toggle-on' href='#'>$toggle_on</a>
 	<a class='toggle describe-toggle-off' href='#'>$toggle_off</a>";
@@ -1077,7 +1406,7 @@ function get_media_item( $attachment_id, $args = null ) {
 	}
 
 	$display_title = ( !empty( $title ) ) ? $title : $filename; // $title shouldn't ever be empty, but just in case
-	$display_title = $show_title ? "<div class='filename new'><span class='title'>" . wp_html_excerpt( $display_title, 60 ) . "</span></div>" : '';
+	$display_title = $r['show_title'] ? "<div class='filename new'><span class='title'>" . wp_html_excerpt( $display_title, 60, '&hellip;' ) . "</span></div>" : '';
 
 	$gallery = ( ( isset( $_REQUEST['tab'] ) && 'gallery' == $_REQUEST['tab'] ) || ( isset( $redir_tab ) && 'gallery' == $redir_tab ) );
 	$order = '';
@@ -1096,14 +1425,23 @@ function get_media_item( $attachment_id, $args = null ) {
 
 	$media_dims = '';
 	$meta = wp_get_attachment_metadata( $post->ID );
-	if ( is_array( $meta ) && array_key_exists( 'width', $meta ) && array_key_exists( 'height', $meta ) )
+	if ( isset( $meta['width'], $meta['height'] ) )
 		$media_dims .= "<span id='media-dims-$post->ID'>{$meta['width']}&nbsp;&times;&nbsp;{$meta['height']}</span> ";
+
+	/**
+	 * Filters the media metadata.
+	 *
+	 * @since 2.5.0
+	 *
+	 * @param string  $media_dims The HTML markup containing the media dimensions.
+	 * @param WP_Post $post       The WP_Post attachment object.
+	 */
 	$media_dims = apply_filters( 'media_meta', $media_dims, $post );
 
 	$image_edit_button = '';
-	if ( gd_edit_image_support( $post->post_mime_type ) ) {
+	if ( wp_attachment_is_image( $post->ID ) && wp_image_editor_supports( array( 'mime_type' => $post->post_mime_type ) ) ) {
 		$nonce = wp_create_nonce( "image_editor-$post->ID" );
-		$image_edit_button = "<input type='button' id='imgedit-open-btn-$post->ID' onclick='imageEdit.open( $post->ID, \"$nonce\" )' class='button' value='" . esc_attr__( 'Edit Image' ) . "' /> <img src='" . esc_url( admin_url( 'images/wpspin_light.gif' ) ) . "' class='imgedit-wait-spin' alt='' />";
+		$image_edit_button = "<input type='button' id='imgedit-open-btn-$post->ID' onclick='imageEdit.open( $post->ID, \"$nonce\" )' class='button' value='" . esc_attr__( 'Edit Image' ) . "' /> <span class='spinner'></span>";
 	}
 
 	$attachment_url = get_permalink( $attachment_id );
@@ -1115,7 +1453,7 @@ function get_media_item( $attachment_id, $args = null ) {
 	$display_title
 	<table class='slidetoggle describe $class'>
 		<thead class='media-item-info' id='media-head-$post->ID'>
-		<tr valign='top'>
+		<tr>
 			<td class='A1B1' id='thumbnail-head-$post->ID'>
 			<p><a href='$attachment_url' target='_blank'><img class='thumbnail' src='$thumb_url' alt='' /></a></p>
 			<p>$image_edit_button</p>
@@ -1123,19 +1461,18 @@ function get_media_item( $attachment_id, $args = null ) {
 			<td>
 			<p><strong>" . __('File name:') . "</strong> $filename</p>
 			<p><strong>" . __('File type:') . "</strong> $post->post_mime_type</p>
-			<p><strong>" . __('Upload date:') . "</strong> " . mysql2date( get_option('date_format'), $post->post_date ). '</p>';
+			<p><strong>" . __('Upload date:') . "</strong> " . mysql2date( __( 'F j, Y' ), $post->post_date ). '</p>';
 			if ( !empty( $media_dims ) )
 				$item .= "<p><strong>" . __('Dimensions:') . "</strong> $media_dims</p>\n";
 
 			$item .= "</td></tr>\n";
 
-
-
 	$item .= "
 		</thead>
 		<tbody>
-		<tr><td colspan='2' class='imgedit-response' id='imgedit-response-$post->ID'></td></tr>
-		<tr><td style='display:none' colspan='2' class='image-editor' id='image-editor-$post->ID'></td></tr>\n";
+		<tr><td colspan='2' class='imgedit-response' id='imgedit-response-$post->ID'></td></tr>\n
+		<tr><td style='display:none' colspan='2' class='image-editor' id='image-editor-$post->ID'></td></tr>\n
+		<tr><td colspan='2'><p class='media-types media-types-required-info'>" . sprintf( __( 'Required fields are marked %s' ), '<span class="required">*</span>' ) . "</p></td></tr>\n";
 
 	$defaults = array(
 		'input'      => 'text',
@@ -1144,20 +1481,25 @@ function get_media_item( $attachment_id, $args = null ) {
 		'extra_rows' => array(),
 	);
 
-	if ( $send )
-		$send = get_submit_button( __( 'Insert into Post' ), 'button', "send[$attachment_id]", false );
+	if ( $r['send'] ) {
+		$r['send'] = get_submit_button( __( 'Insert into Post' ), 'button', "send[$attachment_id]", false );
+	}
+
+	$delete = empty( $r['delete'] ) ? '' : $r['delete'];
 	if ( $delete && current_user_can( 'delete_post', $attachment_id ) ) {
 		if ( !EMPTY_TRASH_DAYS ) {
-			$delete = "<a href='" . wp_nonce_url( "post.php?action=delete&amp;post=$attachment_id", 'delete-attachment_' . $attachment_id ) . "' id='del[$attachment_id]' class='delete'>" . __( 'Delete Permanently' ) . '</a>';
+			$delete = "<a href='" . wp_nonce_url( "post.php?action=delete&amp;post=$attachment_id", 'delete-post_' . $attachment_id ) . "' id='del[$attachment_id]' class='delete-permanently'>" . __( 'Delete Permanently' ) . '</a>';
 		} elseif ( !MEDIA_TRASH ) {
 			$delete = "<a href='#' class='del-link' onclick=\"document.getElementById('del_attachment_$attachment_id').style.display='block';return false;\">" . __( 'Delete' ) . "</a>
-			 <div id='del_attachment_$attachment_id' class='del-attachment' style='display:none;'>" . sprintf( __( 'You are about to delete <strong>%s</strong>.' ), $filename ) . "
-			 <a href='" . wp_nonce_url( "post.php?action=delete&amp;post=$attachment_id", 'delete-attachment_' . $attachment_id ) . "' id='del[$attachment_id]' class='button'>" . __( 'Continue' ) . "</a>
+			 <div id='del_attachment_$attachment_id' class='del-attachment' style='display:none;'>" .
+			 /* translators: %s: file name */
+			'<p>' . sprintf( __( 'You are about to delete %s.' ), '<strong>' . $filename . '</strong>' ) . "</p>
+			 <a href='" . wp_nonce_url( "post.php?action=delete&amp;post=$attachment_id", 'delete-post_' . $attachment_id ) . "' id='del[$attachment_id]' class='button'>" . __( 'Continue' ) . "</a>
 			 <a href='#' class='button' onclick=\"this.parentNode.style.display='none';return false;\">" . __( 'Cancel' ) . "</a>
 			 </div>";
 		} else {
-			$delete = "<a href='" . wp_nonce_url( "post.php?action=trash&amp;post=$attachment_id", 'trash-attachment_' . $attachment_id ) . "' id='del[$attachment_id]' class='delete'>" . __( 'Move to Trash' ) . "</a>
-			<a href='" . wp_nonce_url( "post.php?action=untrash&amp;post=$attachment_id", 'untrash-attachment_' . $attachment_id ) . "' id='undo[$attachment_id]' class='undo hidden'>" . __( 'Undo' ) . "</a>";
+			$delete = "<a href='" . wp_nonce_url( "post.php?action=trash&amp;post=$attachment_id", 'trash-post_' . $attachment_id ) . "' id='del[$attachment_id]' class='delete'>" . __( 'Move to Trash' ) . "</a>
+			<a href='" . wp_nonce_url( "post.php?action=untrash&amp;post=$attachment_id", 'untrash-post_' . $attachment_id ) . "' id='undo[$attachment_id]' class='undo hidden'>" . __( 'Undo' ) . "</a>";
 		}
 	} else {
 		$delete = '';
@@ -1165,19 +1507,24 @@ function get_media_item( $attachment_id, $args = null ) {
 
 	$thumbnail = '';
 	$calling_post_id = 0;
-	if ( isset( $_GET['post_id'] ) )
+	if ( isset( $_GET['post_id'] ) ) {
 		$calling_post_id = absint( $_GET['post_id'] );
-	elseif ( isset( $_POST ) && count( $_POST ) ) // Like for async-upload where $_GET['post_id'] isn't set
+	} elseif ( isset( $_POST ) && count( $_POST ) ) {// Like for async-upload where $_GET['post_id'] isn't set
 		$calling_post_id = $post->post_parent;
+	}
 	if ( 'image' == $type && $calling_post_id && current_theme_supports( 'post-thumbnails', get_post_type( $calling_post_id ) )
 		&& post_type_supports( get_post_type( $calling_post_id ), 'thumbnail' ) && get_post_thumbnail_id( $calling_post_id ) != $attachment_id ) {
+
+		$calling_post = get_post( $calling_post_id );
+		$calling_post_type_object = get_post_type_object( $calling_post->post_type );
+
 		$ajax_nonce = wp_create_nonce( "set_post_thumbnail-$calling_post_id" );
-		$thumbnail = "<a class='wp-post-thumbnail' id='wp-post-thumbnail-" . $attachment_id . "' href='#' onclick='WPSetAsThumbnail(\"$attachment_id\", \"$ajax_nonce\");return false;'>" . esc_html__( "Use as featured image" ) . "</a>";
+		$thumbnail = "<a class='wp-post-thumbnail' id='wp-post-thumbnail-" . $attachment_id . "' href='#' onclick='WPSetAsThumbnail(\"$attachment_id\", \"$ajax_nonce\");return false;'>" . esc_html( $calling_post_type_object->labels->use_featured_image ) . "</a>";
 	}
 
-	if ( ( $send || $thumbnail || $delete ) && !isset( $form_fields['buttons'] ) )
-		$form_fields['buttons'] = array( 'tr' => "\t\t<tr class='submit'><td></td><td class='savesend'>$send $thumbnail $delete</td></tr>\n" );
-
+	if ( ( $r['send'] || $thumbnail || $delete ) && !isset( $form_fields['buttons'] ) ) {
+		$form_fields['buttons'] = array( 'tr' => "\t\t<tr class='submit'><td></td><td class='savesend'>" . $r['send'] . " $thumbnail $delete</td></tr>\n" );
+	}
 	$hidden_fields = array();
 
 	foreach ( $form_fields as $id => $field ) {
@@ -1197,21 +1544,24 @@ function get_media_item( $attachment_id, $args = null ) {
 			continue;
 		}
 
-		$required      = $field['required'] ? '<span class="alignright"><abbr title="required" class="required">*</abbr></span>' : '';
-		$aria_required = $field['required'] ? " aria-required='true' " : '';
+		$required      = $field['required'] ? '<span class="required">*</span>' : '';
+		$required_attr = $field['required'] ? ' required' : '';
+		$aria_required = $field['required'] ? " aria-required='true'" : '';
 		$class  = $id;
 		$class .= $field['required'] ? ' form-required' : '';
 
-		$item .= "\t\t<tr class='$class'>\n\t\t\t<th valign='top' scope='row' class='label'><label for='$name'><span class='alignleft'>{$field['label']}</span>$required<br class='clear' /></label></th>\n\t\t\t<td class='field'>";
+		$item .= "\t\t<tr class='$class'>\n\t\t\t<th scope='row' class='label'><label for='$name'><span class='alignleft'>{$field['label']}{$required}</span><br class='clear' /></label></th>\n\t\t\t<td class='field'>";
 		if ( !empty( $field[ $field['input'] ] ) )
 			$item .= $field[ $field['input'] ];
 		elseif ( $field['input'] == 'textarea' ) {
-			if ( user_can_richedit() ) { // textarea_escaped when user_can_richedit() = false
-				$field['value'] = esc_textarea( $field['value'] );
+			if ( 'post_content' == $id && user_can_richedit() ) {
+				// Sanitize_post() skips the post_content when user_can_richedit.
+				$field['value'] = htmlspecialchars( $field['value'], ENT_QUOTES );
 			}
-			$item .= "<textarea id='$name' name='$name' $aria_required>" . $field['value'] . '</textarea>';
+			// Post_excerpt is already escaped by sanitize_post() in get_attachment_fields_to_edit().
+			$item .= "<textarea id='$name' name='$name'{$required_attr}{$aria_required}>" . $field['value'] . '</textarea>';
 		} else {
-			$item .= "<input type='text' class='text' id='$name' name='$name' value='" . esc_attr( $field['value'] ) . "' $aria_required />";
+			$item .= "<input type='text' class='text' id='$name' name='$name' value='" . esc_attr( $field['value'] ) . "'{$required_attr}{$aria_required} />";
 		}
 		if ( !empty( $field['helps'] ) )
 			$item .= "<p class='help'>" . join( "</p>\n<p class='help'>", array_unique( (array) $field['helps'] ) ) . '</p>';
@@ -1251,179 +1601,407 @@ function get_media_item( $attachment_id, $args = null ) {
 }
 
 /**
- * {@internal Missing Short Description}}
+ * @since 3.5.0
  *
- * @since 2.5.0
+ * @param int   $attachment_id
+ * @param array $args
+ * @return array
  */
-function media_upload_header() {
-	?>
-	<script type="text/javascript">post_id = <?php echo intval($_REQUEST['post_id']); ?>;</script>
-	<div id="media-upload-header">
-	<?php the_media_upload_tabs(); ?>
-	</div>
-	<?php
-}
+function get_compat_media_markup( $attachment_id, $args = null ) {
+	$post = get_post( $attachment_id );
 
-/**
- * {@internal Missing Short Description}}
- *
- * @since 2.5.0
- *
- * @param unknown_type $errors
- */
-function media_upload_form( $errors = null ) {
-	global $type, $tab, $pagenow, $is_IE, $is_opera, $is_iphone;
+	$default_args = array(
+		'errors' => null,
+		'in_modal' => false,
+	);
 
-	if ( $is_iphone )
-		return;
+	$user_can_edit = current_user_can( 'edit_post', $attachment_id );
 
-	$upload_action_url = admin_url('async-upload.php');
-	$post_id = isset($_REQUEST['post_id']) ? intval($_REQUEST['post_id']) : 0;
-	$_type = isset($type) ? $type : '';
-	$_tab = isset($tab) ? $tab : '';
+	$args = wp_parse_args( $args, $default_args );
 
-	$upload_size_unit = $max_upload_size = wp_max_upload_size();
-	$sizes = array( 'KB', 'MB', 'GB' );
+	/** This filter is documented in wp-admin/includes/media.php */
+	$args = apply_filters( 'get_media_item_args', $args );
 
-	for ( $u = -1; $upload_size_unit > 1024 && $u < count( $sizes ) - 1; $u++ ) {
-		$upload_size_unit /= 1024;
-	}
+	$form_fields = array();
 
-	if ( $u < 0 ) {
-		$upload_size_unit = 0;
-		$u = 0;
-	} else {
-		$upload_size_unit = (int) $upload_size_unit;
-	}
-?>
+	if ( $args['in_modal'] ) {
+		foreach ( get_attachment_taxonomies($post) as $taxonomy ) {
+			$t = (array) get_taxonomy($taxonomy);
+			if ( ! $t['public'] || ! $t['show_ui'] )
+				continue;
+			if ( empty($t['label']) )
+				$t['label'] = $taxonomy;
+			if ( empty($t['args']) )
+				$t['args'] = array();
 
-<div id="media-upload-notice"><?php
+			$terms = get_object_term_cache($post->ID, $taxonomy);
+			if ( false === $terms )
+				$terms = wp_get_object_terms($post->ID, $taxonomy, $t['args']);
 
-	if (isset($errors['upload_notice']) )
-		echo $errors['upload_notice'];
+			$values = array();
 
-?></div>
-<div id="media-upload-error"><?php
+			foreach ( $terms as $term )
+				$values[] = $term->slug;
+			$t['value'] = join(', ', $values);
+			$t['taxonomy'] = true;
 
-	if (isset($errors['upload_error']) && is_wp_error($errors['upload_error']))
-		echo $errors['upload_error']->get_error_message();
+			$form_fields[$taxonomy] = $t;
+		}
+	}
 
-?></div>
-<?php
-// Check quota for this blog if multisite
-if ( is_multisite() && !is_upload_space_available() ) {
-	echo '<p>' . sprintf( __( 'Sorry, you have filled your storage quota (%s MB).' ), get_space_allowed() ) . '</p>';
-	return;
-}
+	// Merge default fields with their errors, so any key passed with the error (e.g. 'error', 'helps', 'value') will replace the default
+	// The recursive merge is easily traversed with array casting: foreach ( (array) $things as $thing )
+	$form_fields = array_merge_recursive($form_fields, (array) $args['errors'] );
 
-do_action('pre-upload-ui');
+	/** This filter is documented in wp-admin/includes/media.php */
+	$form_fields = apply_filters( 'attachment_fields_to_edit', $form_fields, $post );
 
-$post_params = array(
-		"post_id" => $post_id,
-		"_wpnonce" => wp_create_nonce('media-form'),
-		"type" => $_type,
-		"tab" => $_tab,
-		"short" => "1",
-);
+	unset( $form_fields['image-size'], $form_fields['align'], $form_fields['image_alt'],
+		$form_fields['post_title'], $form_fields['post_excerpt'], $form_fields['post_content'],
+		$form_fields['url'], $form_fields['menu_order'], $form_fields['image_url'] );
 
-$post_params = apply_filters( 'upload_post_params', $post_params ); // hook change! old name: 'swfupload_post_params'
+	/** This filter is documented in wp-admin/includes/media.php */
+	$media_meta = apply_filters( 'media_meta', '', $post );
 
-$plupload_init = array(
-	'runtimes' => 'html5,silverlight,flash,html4',
-	'browse_button' => 'plupload-browse-button',
-	'container' => 'plupload-upload-ui',
-	'drop_element' => 'drag-drop-area',
-	'file_data_name' => 'async-upload',
-	'multiple_queues' => true,
-	'max_file_size' => $max_upload_size . 'b',
-	'url' => $upload_action_url,
-	'flash_swf_url' => includes_url('js/plupload/plupload.flash.swf'),
-	'silverlight_xap_url' => includes_url('js/plupload/plupload.silverlight.xap'),
-	'filters' => array( array('title' => __( 'Allowed Files' ), 'extensions' => '*') ),
-	'multipart' => true,
-	'urlstream_upload' => true,
-	'multipart_params' => $post_params
-);
+	$defaults = array(
+		'input'         => 'text',
+		'required'      => false,
+		'value'         => '',
+		'extra_rows'    => array(),
+		'show_in_edit'  => true,
+		'show_in_modal' => true,
+	);
 
-$plupload_init = apply_filters( 'plupload_init', $plupload_init );
+	$hidden_fields = array();
 
-?>
+	$item = '';
+	foreach ( $form_fields as $id => $field ) {
+		if ( $id[0] == '_' )
+			continue;
 
-<script type="text/javascript">
-<?php
-// Verify size is an int. If not return default value.
-$large_size_h = absint( get_option('large_size_h') );
-if( !$large_size_h )
-	$large_size_h = 1024;
-$large_size_w = absint( get_option('large_size_w') );
-if( !$large_size_w )
-	$large_size_w = 1024;
-?>
-var resize_height = <?php echo $large_size_h; ?>, resize_width = <?php echo $large_size_w; ?>,
-wpUploaderInit = <?php echo json_encode($plupload_init); ?>;
-</script>
+		$name = "attachments[$attachment_id][$id]";
+		$id_attr = "attachments-$attachment_id-$id";
 
-<div id="plupload-upload-ui" class="hide-if-no-js">
-<?php do_action('pre-plupload-upload-ui'); // hook change, old name: 'pre-flash-upload-ui' ?>
-<div id="drag-drop-area">
-	<div class="drag-drop-inside">
-	<p class="drag-drop-info"><?php _e('Drop files here'); ?></p>
-	<p><?php _ex('or', 'Uploader: Drop files here - or - Select Files'); ?></p>
-	<p class="drag-drop-buttons"><input id="plupload-browse-button" type="button" value="<?php esc_attr_e('Select Files'); ?>" class="button" /></p>
-	</div>
-</div>
-<?php do_action('post-plupload-upload-ui'); // hook change, old name: 'post-flash-upload-ui' ?>
-</div>
+		if ( !empty( $field['tr'] ) ) {
+			$item .= $field['tr'];
+			continue;
+		}
+
+		$field = array_merge( $defaults, $field );
+
+		if ( ( ! $field['show_in_edit'] && ! $args['in_modal'] ) || ( ! $field['show_in_modal'] && $args['in_modal'] ) )
+			continue;
+
+		if ( $field['input'] == 'hidden' ) {
+			$hidden_fields[$name] = $field['value'];
+			continue;
+		}
+
+		$readonly      = ! $user_can_edit && ! empty( $field['taxonomy'] ) ? " readonly='readonly' " : '';
+		$required      = $field['required'] ? '<span class="required">*</span>' : '';
+		$required_attr = $field['required'] ? ' required' : '';
+		$aria_required = $field['required'] ? " aria-required='true'" : '';
+		$class  = 'compat-field-' . $id;
+		$class .= $field['required'] ? ' form-required' : '';
+
+		$item .= "\t\t<tr class='$class'>";
+		$item .= "\t\t\t<th scope='row' class='label'><label for='$id_attr'><span class='alignleft'>{$field['label']}</span>$required<br class='clear' /></label>";
+		$item .= "</th>\n\t\t\t<td class='field'>";
+
+		if ( !empty( $field[ $field['input'] ] ) )
+			$item .= $field[ $field['input'] ];
+		elseif ( $field['input'] == 'textarea' ) {
+			if ( 'post_content' == $id && user_can_richedit() ) {
+				// sanitize_post() skips the post_content when user_can_richedit.
+				$field['value'] = htmlspecialchars( $field['value'], ENT_QUOTES );
+			}
+			$item .= "<textarea id='$id_attr' name='$name'{$required_attr}{$aria_required}>" . $field['value'] . '</textarea>';
+		} else {
+			$item .= "<input type='text' class='text' id='$id_attr' name='$name' value='" . esc_attr( $field['value'] ) . "' $readonly{$required_attr}{$aria_required} />";
+		}
+		if ( !empty( $field['helps'] ) )
+			$item .= "<p class='help'>" . join( "</p>\n<p class='help'>", array_unique( (array) $field['helps'] ) ) . '</p>';
+		$item .= "</td>\n\t\t</tr>\n";
+
+		$extra_rows = array();
+
+		if ( !empty( $field['errors'] ) )
+			foreach ( array_unique( (array) $field['errors'] ) as $error )
+				$extra_rows['error'][] = $error;
+
+		if ( !empty( $field['extra_rows'] ) )
+			foreach ( $field['extra_rows'] as $class => $rows )
+				foreach ( (array) $rows as $html )
+					$extra_rows[$class][] = $html;
+
+		foreach ( $extra_rows as $class => $rows )
+			foreach ( $rows as $html )
+				$item .= "\t\t<tr><td></td><td class='$class'>$html</td></tr>\n";
+	}
+
+	if ( !empty( $form_fields['_final'] ) )
+		$item .= "\t\t<tr class='final'><td colspan='2'>{$form_fields['_final']}</td></tr>\n";
+
+	if ( $item ) {
+		$item = '<p class="media-types media-types-required-info">' .
+			sprintf( __( 'Required fields are marked %s' ), '<span class="required">*</span>' ) . '</p>
+			<table class="compat-attachment-fields">' . $item . '</table>';
+	}
+
+	foreach ( $hidden_fields as $hidden_field => $value ) {
+		$item .= '<input type="hidden" name="' . esc_attr( $hidden_field ) . '" value="' . esc_attr( $value ) . '" />' . "\n";
+	}
+
+	if ( $item )
+		$item = '<input type="hidden" name="attachments[' . $attachment_id . '][menu_order]" value="' . esc_attr( $post->menu_order ) . '" />' . $item;
+
+	return array(
+		'item'   => $item,
+		'meta'   => $media_meta,
+	);
+}
+
+/**
+ * Outputs the legacy media upload header.
+ *
+ * @since 2.5.0
+ */
+function media_upload_header() {
+	$post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0;
+
+	echo '<script type="text/javascript">post_id = ' . $post_id . ';</script>';
+	if ( empty( $_GET['chromeless'] ) ) {
+		echo '<div id="media-upload-header">';
+		the_media_upload_tabs();
+		echo '</div>';
+	}
+}
+
+/**
+ * Outputs the legacy media upload form.
+ *
+ * @since 2.5.0
+ *
+ * @global string $type
+ * @global string $tab
+ * @global bool   $is_IE
+ * @global bool   $is_opera
+ *
+ * @param array $errors
+ */
+function media_upload_form( $errors = null ) {
+	global $type, $tab, $is_IE, $is_opera;
+
+	if ( ! _device_can_upload() ) {
+		echo '<p>' . sprintf( __('The web browser on your device cannot be used to upload files. You may be able to use the <a href="%s">native app for your device</a> instead.'), 'https://apps.wordpress.org/' ) . '</p>';
+		return;
+	}
+
+	$upload_action_url = admin_url('async-upload.php');
+	$post_id = isset($_REQUEST['post_id']) ? intval($_REQUEST['post_id']) : 0;
+	$_type = isset($type) ? $type : '';
+	$_tab = isset($tab) ? $tab : '';
+
+	$max_upload_size = wp_max_upload_size();
+	if ( ! $max_upload_size ) {
+		$max_upload_size = 0;
+	}
+?>
+
+<div id="media-upload-notice"><?php
+
+	if (isset($errors['upload_notice']) )
+		echo $errors['upload_notice'];
+
+?></div>
+<div id="media-upload-error"><?php
+
+	if (isset($errors['upload_error']) && is_wp_error($errors['upload_error']))
+		echo $errors['upload_error']->get_error_message();
+
+?></div>
+<?php
+if ( is_multisite() && !is_upload_space_available() ) {
+	/**
+	 * Fires when an upload will exceed the defined upload space quota for a network site.
+	 *
+	 * @since 3.5.0
+	 */
+	do_action( 'upload_ui_over_quota' );
+	return;
+}
+
+/**
+ * Fires just before the legacy (pre-3.5.0) upload interface is loaded.
+ *
+ * @since 2.6.0
+ */
+do_action( 'pre-upload-ui' );
+
+$post_params = array(
+	"post_id" => $post_id,
+	"_wpnonce" => wp_create_nonce('media-form'),
+	"type" => $_type,
+	"tab" => $_tab,
+	"short" => "1",
+);
+
+/**
+ * Filters the media upload post parameters.
+ *
+ * @since 3.1.0 As 'swfupload_post_params'
+ * @since 3.3.0
+ *
+ * @param array $post_params An array of media upload parameters used by Plupload.
+ */
+$post_params = apply_filters( 'upload_post_params', $post_params );
+
+$plupload_init = array(
+	'runtimes'            => 'html5,flash,silverlight,html4',
+	'browse_button'       => 'plupload-browse-button',
+	'container'           => 'plupload-upload-ui',
+	'drop_element'        => 'drag-drop-area',
+	'file_data_name'      => 'async-upload',
+	'url'                 => $upload_action_url,
+	'flash_swf_url'       => includes_url( 'js/plupload/plupload.flash.swf' ),
+	'silverlight_xap_url' => includes_url( 'js/plupload/plupload.silverlight.xap' ),
+	'filters' => array(
+		'max_file_size'   => $max_upload_size . 'b',
+	),
+	'multipart_params'    => $post_params,
+);
+
+// Currently only iOS Safari supports multiple files uploading but iOS 7.x has a bug that prevents uploading of videos
+// when enabled. See #29602.
+if ( wp_is_mobile() && strpos( $_SERVER['HTTP_USER_AGENT'], 'OS 7_' ) !== false &&
+	strpos( $_SERVER['HTTP_USER_AGENT'], 'like Mac OS X' ) !== false ) {
+
+	$plupload_init['multi_selection'] = false;
+}
+
+/**
+ * Filters the default Plupload settings.
+ *
+ * @since 3.3.0
+ *
+ * @param array $plupload_init An array of default settings used by Plupload.
+ */
+$plupload_init = apply_filters( 'plupload_init', $plupload_init );
+
+?>
+
+<script type="text/javascript">
+<?php
+// Verify size is an int. If not return default value.
+$large_size_h = absint( get_option('large_size_h') );
+if( !$large_size_h )
+	$large_size_h = 1024;
+$large_size_w = absint( get_option('large_size_w') );
+if( !$large_size_w )
+	$large_size_w = 1024;
+?>
+var resize_height = <?php echo $large_size_h; ?>, resize_width = <?php echo $large_size_w; ?>,
+wpUploaderInit = <?php echo wp_json_encode( $plupload_init ); ?>;
+</script>
+
+<div id="plupload-upload-ui" class="hide-if-no-js">
+<?php
+/**
+ * Fires before the upload interface loads.
+ *
+ * @since 2.6.0 As 'pre-flash-upload-ui'
+ * @since 3.3.0
+ */
+do_action( 'pre-plupload-upload-ui' ); ?>
+<div id="drag-drop-area">
+	<div class="drag-drop-inside">
+	<p class="drag-drop-info"><?php _e('Drop files here'); ?></p>
+	<p><?php _ex('or', 'Uploader: Drop files here - or - Select Files'); ?></p>
+	<p class="drag-drop-buttons"><input id="plupload-browse-button" type="button" value="<?php esc_attr_e('Select Files'); ?>" class="button" /></p>
+	</div>
+</div>
+<?php
+/**
+ * Fires after the upload interface loads.
+ *
+ * @since 2.6.0 As 'post-flash-upload-ui'
+ * @since 3.3.0
+ */
+do_action( 'post-plupload-upload-ui' ); ?>
+</div>
 
 <div id="html-upload-ui" class="hide-if-js">
-<?php do_action('pre-html-upload-ui'); ?>
+	<?php
+	/**
+	 * Fires before the upload button in the media upload interface.
+	 *
+	 * @since 2.6.0
+	 */
+	do_action( 'pre-html-upload-ui' );
+	?>
 	<p id="async-upload-wrap">
 		<label class="screen-reader-text" for="async-upload"><?php _e('Upload'); ?></label>
 		<input type="file" name="async-upload" id="async-upload" />
-		<?php submit_button( __( 'Upload' ), 'button', 'html-upload', false ); ?>
+		<?php submit_button( __( 'Upload' ), 'primary', 'html-upload', false ); ?>
 		<a href="#" onclick="try{top.tb_remove();}catch(e){}; return false;"><?php _e('Cancel'); ?></a>
 	</p>
 	<div class="clear"></div>
-<?php do_action('post-html-upload-ui'); ?>
+<?php
+/**
+ * Fires after the upload button in the media upload interface.
+ *
+ * @since 2.6.0
+ */
+do_action( 'post-html-upload-ui' );
+?>
 </div>
 
-<span class="max-upload-size"><?php printf( __( 'Maximum upload file size: %d%s.' ), esc_html($upload_size_unit), esc_html($sizes[$u]) ); ?></span>
+<p class="max-upload-size"><?php printf( __( 'Maximum upload file size: %s.' ), esc_html( size_format( $max_upload_size ) ) ); ?></p>
 <?php
-if ( ($is_IE || $is_opera) && $max_upload_size > 100 * 1024 * 1024 ) { ?>
-	<span class="big-file-warning"><?php _e('Your browser has some limitations uploading large files with the multi-file uploader. Please use the browser uploader for files over 100MB.'); ?></span>
-<?php }
 
-	do_action('post-upload-ui');
+	/**
+	 * Fires on the post upload UI screen.
+	 *
+	 * Legacy (pre-3.5.0) media workflow hook.
+	 *
+	 * @since 2.6.0
+	 */
+	do_action( 'post-upload-ui' );
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Outputs the legacy media upload form for a given media type.
  *
  * @since 2.5.0
  *
- * @param unknown_type $type
- * @param unknown_type $errors
- * @param unknown_type $id
+ * @param string $type
+ * @param object $errors
+ * @param integer $id
  */
 function media_upload_type_form($type = 'file', $errors = null, $id = null) {
-	global $is_iphone;
-
-	if ( $is_iphone )
-		return;
 
 	media_upload_header();
 
 	$post_id = isset( $_REQUEST['post_id'] )? intval( $_REQUEST['post_id'] ) : 0;
 
 	$form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id");
-	$form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type);
+
+	/**
+	 * Filters the media upload form action URL.
+	 *
+	 * @since 2.6.0
+	 *
+	 * @param string $form_action_url The media upload form action URL.
+	 * @param string $type            The type of media. Default 'file'.
+	 */
+	$form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type );
 	$form_class = 'media-upload-form type-form validate';
 
 	if ( get_user_setting('uploader') )
 		$form_class .= ' html-uploader';
 ?>
 
-<form enctype="multipart/form-data" method="post" action="<?php echo esc_attr($form_action_url); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form">
+<form enctype="multipart/form-data" method="post" action="<?php echo esc_url( $form_action_url ); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form">
 <?php submit_button( '', 'hidden', 'save', false ); ?>
 <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" />
 <?php wp_nonce_field('media-form'); ?>
@@ -1433,7 +2011,6 @@ function media_upload_type_form($type = 'file', $errors = null, $id = null) {
 <?php media_upload_form( $errors ); ?>
 
 <script type="text/javascript">
-//<![CDATA[
 jQuery(function($){
 	var preloaded = $(".media-item.preloaded");
 	if ( preloaded.length > 0 ) {
@@ -1441,7 +2018,6 @@ jQuery(function($){
 	}
 	updateMediaForm();
 });
-//]]>
 </script>
 <div id="media-items"><?php
 
@@ -1464,13 +2040,13 @@ if ( $id ) {
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Outputs the legacy media upload form for external media.
  *
  * @since 2.7.0
  *
- * @param unknown_type $type
- * @param unknown_type $errors
- * @param unknown_type $id
+ * @param string $type
+ * @param object $errors
+ * @param integer $id
  */
 function media_upload_type_url_form($type = null, $errors = null, $id = null) {
 	if ( null === $type )
@@ -1478,24 +2054,24 @@ function media_upload_type_url_form($type = null, $errors = null, $id = null) {
 
 	media_upload_header();
 
-	$post_id = intval($_REQUEST['post_id']);
+	$post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0;
 
 	$form_action_url = admin_url("media-upload.php?type=$type&tab=type&post_id=$post_id");
-	$form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type);
+	/** This filter is documented in wp-admin/includes/media.php */
+	$form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type );
 	$form_class = 'media-upload-form type-form validate';
 
 	if ( get_user_setting('uploader') )
 		$form_class .= ' html-uploader';
 ?>
 
-<form enctype="multipart/form-data" method="post" action="<?php echo esc_attr($form_action_url); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form">
+<form enctype="multipart/form-data" method="post" action="<?php echo esc_url( $form_action_url ); ?>" class="<?php echo $form_class; ?>" id="<?php echo $type; ?>-form">
 <input type="hidden" name="post_id" id="post_id" value="<?php echo (int) $post_id; ?>" />
 <?php wp_nonce_field('media-form'); ?>
 
 <h3 class="media-title"><?php _e('Insert media from another website'); ?></h3>
 
 <script type="text/javascript">
-//<![CDATA[
 var addExtImage = {
 
 	width : '',
@@ -1508,22 +2084,26 @@ var addExtImage = {
 		if ( '' == f.src.value || '' == t.width )
 			return false;
 
-		if ( f.title.value ) {
-			title = f.title.value.replace(/'/g, '&#039;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
-			title = ' title="'+title+'"';
-		}
-
 		if ( f.alt.value )
 			alt = f.alt.value.replace(/'/g, '&#039;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
 
-<?php if ( ! apply_filters( 'disable_captions', '' ) ) { ?>
-		if ( f.caption.value )
-			caption = f.caption.value.replace(/'/g, '&#039;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
+<?php
+	/** This filter is documented in wp-admin/includes/media.php */
+	if ( ! apply_filters( 'disable_captions', '' ) ) {
+		?>
+		if ( f.caption.value ) {
+			caption = f.caption.value.replace(/\r\n|\r/g, '\n');
+			caption = caption.replace(/<[a-zA-Z0-9]+( [^<>]+)?>/g, function(a){
+				return a.replace(/[\r\n\t]+/, ' ');
+			});
+
+			caption = caption.replace(/\s*\n\s*/g, '<br />');
+		}
 <?php } ?>
 
 		cls = caption ? '' : ' class="'+t.align+'"';
 
-		html = '<img alt="'+alt+'" src="'+f.src.value+'"'+title+cls+' width="'+t.width+'" height="'+t.height+'" />';
+		html = '<img alt="'+alt+'" src="'+f.src.value+'"'+cls+' width="'+t.width+'" height="'+t.height+'" />';
 
 		if ( f.url.value ) {
 			url = f.url.value.replace(/'/g, '&#039;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
@@ -1531,7 +2111,7 @@ var addExtImage = {
 		}
 
 		if ( caption )
-			html = '[caption id="" align="'+t.align+'" width="'+t.width+'" caption="'+caption+'"]'+html+'[/caption]';
+			html = '[caption id="" align="'+t.align+'" width="'+t.width+'"]'+html+caption+'[/caption]';
 
 		var win = window.dialogArguments || opener || parent || top;
 		win.send_to_editor(html);
@@ -1544,7 +2124,7 @@ var addExtImage = {
 		t.width = t.height = '';
 		document.getElementById('go_button').style.color = '#bbb';
 		if ( ! document.forms[0].src.value )
-			document.getElementById('status_img').innerHTML = '*';
+			document.getElementById('status_img').innerHTML = '';
 		else document.getElementById('status_img').innerHTML = '<img src="<?php echo esc_url( admin_url( 'images/no.png' ) ); ?>" alt="" />';
 	},
 
@@ -1568,26 +2148,33 @@ var addExtImage = {
 			return false;
 		}
 
-		document.getElementById('status_img').innerHTML = '<img src="<?php echo esc_url( admin_url( 'images/wpspin_light.gif' ) ); ?>" alt="" />';
+		document.getElementById('status_img').innerHTML = '<img src="<?php echo esc_url( admin_url( 'images/spinner-2x.gif' ) ); ?>" alt="" width="16" height="16" />';
 		t.preloadImg = new Image();
 		t.preloadImg.onload = t.updateImageData;
 		t.preloadImg.onerror = t.resetImageData;
 		t.preloadImg.src = src;
 	}
-}
+};
 
 jQuery(document).ready( function($) {
 	$('.media-types input').click( function() {
 		$('table.describe').toggleClass('not-image', $('#not-image').prop('checked') );
 	});
 });
-
-//]]>
 </script>
 
 <div id="media-items">
 <div class="media-item media-blank">
-<?php echo apply_filters( 'type_url_form_media', wp_media_insert_url_form( $type ) ); ?>
+<?php
+/**
+ * Filters the insert media from URL form HTML.
+ *
+ * @since 3.3.0
+ *
+ * @param string $form_html The insert from URL form HTML.
+ */
+echo apply_filters( 'type_url_form_media', wp_media_insert_url_form( $type ) );
+?>
 </div>
 </div>
 </form>
@@ -1595,11 +2182,15 @@ jQuery(document).ready( function($) {
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Adds gallery form to upload iframe
  *
  * @since 2.5.0
  *
- * @param unknown_type $errors
+ * @global string $redir_tab
+ * @global string $type
+ * @global string $tab
+ *
+ * @param array $errors
  */
 function media_upload_gallery_form($errors) {
 	global $redir_tab, $type;
@@ -1609,7 +2200,8 @@ function media_upload_gallery_form($errors) {
 
 	$post_id = intval($_REQUEST['post_id']);
 	$form_action_url = admin_url("media-upload.php?type=$type&tab=gallery&post_id=$post_id");
-	$form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type);
+	/** This filter is documented in wp-admin/includes/media.php */
+	$form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type );
 	$form_class = 'media-upload-form validate';
 
 	if ( get_user_setting('uploader') )
@@ -1617,7 +2209,6 @@ function media_upload_gallery_form($errors) {
 ?>
 
 <script type="text/javascript">
-<!--
 jQuery(function($){
 	var preloaded = $(".media-item.preloaded");
 	if ( preloaded.length > 0 ) {
@@ -1625,7 +2216,6 @@ jQuery(function($){
 		updateMediaForm();
 	}
 });
--->
 </script>
 <div id="sort-buttons" class="hide-if-no-js">
 <span>
@@ -1638,10 +2228,10 @@ jQuery(function($){
 <a href="#" id="desc"><?php _e('Descending'); ?></a> |
 <a href="#" id="clear"><?php _ex('Clear', 'verb'); ?></a>
 </div>
-<form enctype="multipart/form-data" method="post" action="<?php echo esc_attr($form_action_url); ?>" class="<?php echo $form_class; ?>" id="gallery-form">
+<form enctype="multipart/form-data" method="post" action="<?php echo esc_url( $form_action_url ); ?>" class="<?php echo $form_class; ?>" id="gallery-form">
 <?php wp_nonce_field('media-form'); ?>
 <?php //media_upload_form( $errors ); ?>
-<table class="widefat" cellspacing="0">
+<table class="widefat">
 <thead><tr>
 <th><?php _e('Media'); ?></th>
 <th class="order-head"><?php _e('Order'); ?></th>
@@ -1741,47 +2331,59 @@ jQuery(function($){
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Outputs the legacy media upload form for the media library.
  *
  * @since 2.5.0
  *
- * @param unknown_type $errors
+ * @global wpdb      $wpdb
+ * @global WP_Query  $wp_query
+ * @global WP_Locale $wp_locale
+ * @global string    $type
+ * @global string    $tab
+ * @global array     $post_mime_types
+ *
+ * @param array $errors
  */
 function media_upload_library_form($errors) {
 	global $wpdb, $wp_query, $wp_locale, $type, $tab, $post_mime_types;
 
 	media_upload_header();
 
-	$post_id = intval($_REQUEST['post_id']);
+	$post_id = isset( $_REQUEST['post_id'] ) ? intval( $_REQUEST['post_id'] ) : 0;
 
 	$form_action_url = admin_url("media-upload.php?type=$type&tab=library&post_id=$post_id");
-	$form_action_url = apply_filters('media_upload_form_url', $form_action_url, $type);
+	/** This filter is documented in wp-admin/includes/media.php */
+	$form_action_url = apply_filters( 'media_upload_form_url', $form_action_url, $type );
 	$form_class = 'media-upload-form validate';
 
 	if ( get_user_setting('uploader') )
 		$form_class .= ' html-uploader';
 
-	$_GET['paged'] = isset( $_GET['paged'] ) ? intval($_GET['paged']) : 0;
-	if ( $_GET['paged'] < 1 )
-		$_GET['paged'] = 1;
-	$start = ( $_GET['paged'] - 1 ) * 10;
-	if ( $start < 1 )
-		$start = 0;
-	add_filter( 'post_limits', create_function( '$a', "return 'LIMIT $start, 10';" ) );
+	$q = $_GET;
+	$q['posts_per_page'] = 10;
+	$q['paged'] = isset( $q['paged'] ) ? intval( $q['paged'] ) : 0;
+	if ( $q['paged'] < 1 ) {
+		$q['paged'] = 1;
+	}
+	$q['offset'] = ( $q['paged'] - 1 ) * 10;
+	if ( $q['offset'] < 1 ) {
+		$q['offset'] = 0;
+	}
 
-	list($post_mime_types, $avail_post_mime_types) = wp_edit_attachments_query();
+	list($post_mime_types, $avail_post_mime_types) = wp_edit_attachments_query( $q );
 
 ?>
 
-<form id="filter" action="" method="get">
+<form id="filter" method="get">
 <input type="hidden" name="type" value="<?php echo esc_attr( $type ); ?>" />
 <input type="hidden" name="tab" value="<?php echo esc_attr( $tab ); ?>" />
 <input type="hidden" name="post_id" value="<?php echo (int) $post_id; ?>" />
 <input type="hidden" name="post_mime_type" value="<?php echo isset( $_GET['post_mime_type'] ) ? esc_attr( $_GET['post_mime_type'] ) : ''; ?>" />
+<input type="hidden" name="context" value="<?php echo isset( $_GET['context'] ) ? esc_attr( $_GET['context'] ) : ''; ?>" />
 
 <p id="media-search" class="search-box">
 	<label class="screen-reader-text" for="media-search-input"><?php _e('Search Media');?>:</label>
-	<input type="text" id="media-search-input" name="s" value="<?php the_search_query(); ?>" />
+	<input type="search" id="media-search-input" name="s" value="<?php the_search_query(); ?>" />
 	<?php submit_button( __( 'Search Media' ), 'button', '', false ); ?>
 </p>
 
@@ -1805,7 +2407,7 @@ if ( empty($_GET['post_mime_type']) || $_GET['post_mime_type'] == 'all' )
 	$class = ' class="current"';
 else
 	$class = '';
-$type_links[] = "<li><a href='" . esc_url(add_query_arg(array('post_mime_type'=>'all', 'paged'=>false, 'm'=>false))) . "'$class>".__('All Types')."</a>";
+$type_links[] = '<li><a href="' . esc_url(add_query_arg(array('post_mime_type'=>'all', 'paged'=>false, 'm'=>false))) . '"' . $class . '>' . __('All Types') . '</a>';
 foreach ( $post_mime_types as $mime_type => $label ) {
 	$class = '';
 
@@ -1815,8 +2417,17 @@ foreach ( $post_mime_types as $mime_type => $label ) {
 	if ( isset($_GET['post_mime_type']) && wp_match_mime_types($mime_type, $_GET['post_mime_type']) )
 		$class = ' class="current"';
 
-	$type_links[] = "<li><a href='" . esc_url(add_query_arg(array('post_mime_type'=>$mime_type, 'paged'=>false))) . "'$class>" . sprintf( translate_nooped_plural( $label[2], $num_posts[$mime_type] ), "<span id='$mime_type-counter'>" . number_format_i18n( $num_posts[$mime_type] ) . '</span>') . '</a>';
+	$type_links[] = '<li><a href="' . esc_url(add_query_arg(array('post_mime_type'=>$mime_type, 'paged'=>false))) . '"' . $class . '>' . sprintf( translate_nooped_plural( $label[2], $num_posts[$mime_type] ), '<span id="' . $mime_type . '-counter">' . number_format_i18n( $num_posts[$mime_type] ) . '</span>') . '</a>';
 }
+/**
+ * Filters the media upload mime type list items.
+ *
+ * Returned values should begin with an `<li>` tag.
+ *
+ * @since 3.1.0
+ *
+ * @param array $type_links An array of list items containing mime type link HTML.
+ */
 echo implode(' | </li>', apply_filters( 'media_upload_mime_type_links', $type_links ) ) . '</li>';
 unset($type_links);
 ?>
@@ -1831,7 +2442,7 @@ $page_links = paginate_links( array(
 	'prev_text' => __('&laquo;'),
 	'next_text' => __('&raquo;'),
 	'total' => ceil($wp_query->found_posts / 10),
-	'current' => $_GET['paged']
+	'current' => $q['paged'],
 ));
 
 if ( $page_links )
@@ -1846,17 +2457,18 @@ $arc_query = "SELECT DISTINCT YEAR(post_date) AS yyear, MONTH(post_date) AS mmon
 $arc_result = $wpdb->get_results( $arc_query );
 
 $month_count = count($arc_result);
+$selected_month = isset( $_GET['m'] ) ? $_GET['m'] : 0;
 
 if ( $month_count && !( 1 == $month_count && 0 == $arc_result[0]->mmonth ) ) { ?>
 <select name='m'>
-<option<?php selected( @$_GET['m'], 0 ); ?> value='0'><?php _e('Show all dates'); ?></option>
+<option<?php selected( $selected_month, 0 ); ?> value='0'><?php _e( 'All dates' ); ?></option>
 <?php
 foreach ($arc_result as $arc_row) {
 	if ( $arc_row->yyear == 0 )
 		continue;
 	$arc_row->mmonth = zeroise( $arc_row->mmonth, 2 );
 
-	if ( isset($_GET['m']) && ( $arc_row->yyear . $arc_row->mmonth == $_GET['m'] ) )
+	if ( $arc_row->yyear . $arc_row->mmonth == $selected_month )
 		$default = ' selected="selected"';
 	else
 		$default = '';
@@ -1869,7 +2481,7 @@ foreach ($arc_result as $arc_row) {
 </select>
 <?php } ?>
 
-<?php submit_button( __( 'Filter &#187;' ), 'secondary', 'post-query-submit', false ); ?>
+<?php submit_button( __( 'Filter &#187;' ), 'button', 'post-query-submit', false ); ?>
 
 </div>
 
@@ -1877,7 +2489,7 @@ foreach ($arc_result as $arc_row) {
 </div>
 </form>
 
-<form enctype="multipart/form-data" method="post" action="<?php echo esc_attr($form_action_url); ?>" class="<?php echo $form_class; ?>" id="library-form">
+<form enctype="multipart/form-data" method="post" action="<?php echo esc_url( $form_action_url ); ?>" class="<?php echo $form_class; ?>" id="library-form">
 
 <?php wp_nonce_field('media-form'); ?>
 <?php //media_upload_form( $errors ); ?>
@@ -1907,20 +2519,22 @@ jQuery(function($){
 }
 
 /**
- * {@internal Missing Short Description}}
+ * Creates the form for external url
  *
  * @since 2.7.0
  *
- * @return unknown
+ * @param string $default_view
+ * @return string the form html
  */
 function wp_media_insert_url_form( $default_view = 'image' ) {
-	if ( !apply_filters( 'disable_captions', '' ) ) {
+	/** This filter is documented in wp-admin/includes/media.php */
+	if ( ! apply_filters( 'disable_captions', '' ) ) {
 		$caption = '
 		<tr class="image-only">
-			<th valign="top" scope="row" class="label">
-				<span class="alignleft"><label for="caption">' . __('Image Caption') . '</label></span>
+			<th scope="row" class="label">
+				<label for="caption"><span class="alignleft">' . __('Image Caption') . '</span></label>
 			</th>
-			<td class="field"><input id="caption" name="caption" value="" type="text" /></td>
+			<td class="field"><textarea id="caption" name="caption"></textarea></td>
 		</tr>
 ';
 	} else {
@@ -1940,35 +2554,35 @@ function wp_media_insert_url_form( $default_view = 'image' ) {
 
 	return '
 	<p class="media-types"><label><input type="radio" name="media_type" value="image" id="image-only"' . checked( 'image-only', $view, false ) . ' /> ' . __( 'Image' ) . '</label> &nbsp; &nbsp; <label><input type="radio" name="media_type" value="generic" id="not-image"' . checked( 'not-image', $view, false ) . ' /> ' . __( 'Audio, Video, or Other File' ) . '</label></p>
+	<p class="media-types media-types-required-info">' . sprintf( __( 'Required fields are marked %s' ), '<span class="required">*</span>' ) . '</p>
 	<table class="describe ' . $table_class . '"><tbody>
 		<tr>
-			<th valign="top" scope="row" class="label" style="width:130px;">
-				<span class="alignleft"><label for="src">' . __('URL') . '</label></span>
-				<span class="alignright"><abbr id="status_img" title="required" class="required">*</abbr></span>
+			<th scope="row" class="label" style="width:130px;">
+				<label for="src"><span class="alignleft">' . __( 'URL' ) . '</span> <span class="required">*</span></label>
+				<span class="alignright" id="status_img"></span>
 			</th>
-			<td class="field"><input id="src" name="src" value="" type="text" aria-required="true" onblur="addExtImage.getImageData()" /></td>
+			<td class="field"><input id="src" name="src" value="" type="text" required aria-required="true" onblur="addExtImage.getImageData()" /></td>
 		</tr>
 
 		<tr>
-			<th valign="top" scope="row" class="label">
-				<span class="alignleft"><label for="title">' . __('Title') . '</label></span>
-				<span class="alignright"><abbr title="required" class="required">*</abbr></span>
+			<th scope="row" class="label">
+				<label for="title"><span class="alignleft">' . __( 'Title' ) . '</span> <span class="required">*</span></label>
 			</th>
-			<td class="field"><input id="title" name="title" value="" type="text" aria-required="true" /></td>
+			<td class="field"><input id="title" name="title" value="" type="text" required aria-required="true" /></td>
 		</tr>
 
 		<tr class="not-image"><td></td><td><p class="help">' . __('Link text, e.g. &#8220;Ransom Demands (PDF)&#8221;') . '</p></td></tr>
 
 		<tr class="image-only">
-			<th valign="top" scope="row" class="label">
-				<span class="alignleft"><label for="alt">' . __('Alternate Text') . '</label></span>
+			<th scope="row" class="label">
+				<label for="alt"><span class="alignleft">' . __('Alternative Text') . '</span></label>
 			</th>
 			<td class="field"><input id="alt" name="alt" value="" type="text" aria-required="true" />
 			<p class="help">' . __('Alt text for the image, e.g. &#8220;The Mona Lisa&#8221;') . '</p></td>
 		</tr>
 		' . $caption . '
 		<tr class="align image-only">
-			<th valign="top" scope="row" class="label"><p><label for="align">' . __('Alignment') . '</label></p></th>
+			<th scope="row" class="label"><p><label for="align">' . __('Alignment') . '</label></p></th>
 			<td class="field">
 				<input name="align" id="align-none" value="none" onclick="addExtImage.align=\'align\'+this.value" type="radio"' . ($default_align == 'none' ? ' checked="checked"' : '').' />
 				<label for="align-none" class="align image-align-none-label">' . __('None') . '</label>
@@ -1982,8 +2596,8 @@ function wp_media_insert_url_form( $default_view = 'image' ) {
 		</tr>
 
 		<tr class="image-only">
-			<th valign="top" scope="row" class="label">
-				<span class="alignleft"><label for="url">' . __('Link Image To:') . '</label></span>
+			<th scope="row" class="label">
+				<label for="url"><span class="alignleft">' . __('Link Image To:') . '</span></label>
 			</th>
 			<td class="field"><input id="url" name="url" value="" type="text" /><br />
 
@@ -2008,69 +2622,52 @@ function wp_media_insert_url_form( $default_view = 'image' ) {
 
 }
 
-function _insert_into_post_button($type) {
-	if ( !post_type_supports(get_post_type($_GET['post_id']), 'editor') )
-		return '';
-
-	if ( 'image' == $type )
-	return '
-		<tr>
-			<td></td>
-			<td>
-				<input type="button" class="button" id="go_button" style="color:#bbb;" onclick="addExtImage.insert()" value="' . esc_attr__('Insert into Post') . '" />
-			</td>
-		</tr>
-	';
-
-	return '
-		<tr>
-			<td></td>
-			<td>
-				' . get_submit_button( __( 'Insert into Post' ), 'button', 'insertonlybutton', false ) . '
-			</td>
-		</tr>
-	';
-}
-
 /**
- * {@internal Missing Short Description}}
+ * Displays the multi-file uploader message.
  *
  * @since 2.6.0
+ *
+ * @global int $post_ID
  */
 function media_upload_flash_bypass() {
+	$browser_uploader = admin_url( 'media-new.php?browser-uploader' );
+
+	if ( $post = get_post() )
+		$browser_uploader .= '&amp;post_id=' . intval( $post->ID );
+	elseif ( ! empty( $GLOBALS['post_ID'] ) )
+		$browser_uploader .= '&amp;post_id=' . intval( $GLOBALS['post_ID'] );
+
 	?>
 	<p class="upload-flash-bypass">
-	<?php _e('You are using the multi-file uploader. Problems? Try the <a href="#">browser uploader</a> instead.'); ?>
+	<?php printf( __( 'You are using the multi-file uploader. Problems? Try the <a href="%1$s" target="%2$s">browser uploader</a> instead.' ), $browser_uploader, '_blank' ); ?>
 	</p>
 	<?php
 }
-add_action('post-plupload-upload-ui', 'media_upload_flash_bypass');
 
 /**
- * {@internal Missing Short Description}}
+ * Displays the browser's built-in uploader message.
  *
  * @since 2.6.0
  */
 function media_upload_html_bypass() {
 	?>
 	<p class="upload-html-bypass hide-if-no-js">
-	<?php _e('You are using the browser&#8217;s built-in file uploader. The new WordPress uploader includes multiple file selection and drag and drop capability. <a href="#">Switch to the new uploader</a>.'); ?>
+	   <?php _e('You are using the browser&#8217;s built-in file uploader. The WordPress uploader includes multiple file selection and drag and drop capability. <a href="#">Switch to the multi-file uploader</a>.'); ?>
 	</p>
 	<?php
 }
-add_action('post-html-upload-ui', 'media_upload_html_bypass');
 
-function media_upload_text_after() {
-	?>
-	<span class="after-file-upload"><?php _e('After a file has been uploaded, you can add titles and descriptions.'); ?></span>
-	<?php
-}
-add_action('post-upload-ui', 'media_upload_text_after', 5);
+/**
+ * Used to display a "After a file has been uploaded..." help message.
+ *
+ * @since 3.3.0
+ */
+function media_upload_text_after() {}
 
 /**
- * {@internal Missing Short Description}}
+ * Displays the checkbox to scale images.
  *
- * @since 2.6.0
+ * @since 3.3.0
  */
 function media_upload_max_image_resize() {
 	$checked = get_user_setting('upload_resize') ? ' checked="true"' : '';
@@ -2091,15 +2688,476 @@ function media_upload_max_image_resize() {
 <?php
 }
 
-add_filter( 'async_upload_image', 'get_media_item', 10, 2 );
-add_filter( 'async_upload_audio', 'get_media_item', 10, 2 );
-add_filter( 'async_upload_video', 'get_media_item', 10, 2 );
-add_filter( 'async_upload_file',  'get_media_item', 10, 2 );
+/**
+ * Displays the out of storage quota message in Multisite.
+ *
+ * @since 3.5.0
+ */
+function multisite_over_quota_message() {
+	echo '<p>' . sprintf( __( 'Sorry, you have used all of your storage quota of %s MB.' ), get_space_allowed() ) . '</p>';
+}
+
+/**
+ * Displays the image and editor in the post editor
+ *
+ * @since 3.5.0
+ *
+ * @param WP_Post $post A post object.
+ */
+function edit_form_image_editor( $post ) {
+	$open = isset( $_GET['image-editor'] );
+	if ( $open )
+		require_once ABSPATH . 'wp-admin/includes/image-edit.php';
+
+	$thumb_url = false;
+	if ( $attachment_id = intval( $post->ID ) )
+		$thumb_url = wp_get_attachment_image_src( $attachment_id, array( 900, 450 ), true );
+
+	$alt_text = get_post_meta( $post->ID, '_wp_attachment_image_alt', true );
+
+	$att_url = wp_get_attachment_url( $post->ID ); ?>
+	<div class="wp_attachment_holder wp-clearfix">
+	<?php
+	if ( wp_attachment_is_image( $post->ID ) ) :
+		$image_edit_button = '';
+		if ( wp_image_editor_supports( array( 'mime_type' => $post->post_mime_type ) ) ) {
+			$nonce = wp_create_nonce( "image_editor-$post->ID" );
+			$image_edit_button = "<input type='button' id='imgedit-open-btn-$post->ID' onclick='imageEdit.open( $post->ID, \"$nonce\" )' class='button' value='" . esc_attr__( 'Edit Image' ) . "' /> <span class='spinner'></span>";
+		}
+	?>
+
+		<div class="imgedit-response" id="imgedit-response-<?php echo $attachment_id; ?>"></div>
+
+		<div<?php if ( $open ) echo ' style="display:none"'; ?> class="wp_attachment_image wp-clearfix" id="media-head-<?php echo $attachment_id; ?>">
+			<p id="thumbnail-head-<?php echo $attachment_id; ?>"><img class="thumbnail" src="<?php echo set_url_scheme( $thumb_url[0] ); ?>" style="max-width:100%" alt="" /></p>
+			<p><?php echo $image_edit_button; ?></p>
+		</div>
+		<div<?php if ( ! $open ) echo ' style="display:none"'; ?> class="image-editor" id="image-editor-<?php echo $attachment_id; ?>">
+			<?php if ( $open ) wp_image_editor( $attachment_id ); ?>
+		</div>
+	<?php
+	elseif ( $attachment_id && wp_attachment_is( 'audio', $post ) ):
+
+		wp_maybe_generate_attachment_metadata( $post );
+
+		echo wp_audio_shortcode( array( 'src' => $att_url ) );
+
+	elseif ( $attachment_id && wp_attachment_is( 'video', $post ) ):
+
+		wp_maybe_generate_attachment_metadata( $post );
+
+		$meta = wp_get_attachment_metadata( $attachment_id );
+		$w = ! empty( $meta['width'] ) ? min( $meta['width'], 640 ) : 0;
+		$h = ! empty( $meta['height'] ) ? $meta['height'] : 0;
+		if ( $h && $w < $meta['width'] ) {
+			$h = round( ( $meta['height'] * $w ) / $meta['width'] );
+		}
+
+		$attr = array( 'src' => $att_url );
+		if ( ! empty( $w ) && ! empty( $h ) ) {
+			$attr['width'] = $w;
+			$attr['height'] = $h;
+		}
+
+		$thumb_id = get_post_thumbnail_id( $attachment_id );
+		if ( ! empty( $thumb_id ) ) {
+			$attr['poster'] = wp_get_attachment_url( $thumb_id );
+		}
+
+		echo wp_video_shortcode( $attr );
+
+	else :
+
+		/**
+		 * Fires when an attachment type can't be rendered in the edit form.
+		 *
+		 * @since 4.6.0
+		 *
+		 * @param WP_Post $post A post object.
+		 */
+		do_action( 'wp_edit_form_attachment_display', $post );
+
+	endif; ?>
+	</div>
+	<div class="wp_attachment_details edit-form-section">
+		<p>
+			<label for="attachment_caption"><strong><?php _e( 'Caption' ); ?></strong></label><br />
+			<textarea class="widefat" name="excerpt" id="attachment_caption"><?php echo $post->post_excerpt; ?></textarea>
+		</p>
+
+
+	<?php if ( 'image' === substr( $post->post_mime_type, 0, 5 ) ) : ?>
+		<p>
+			<label for="attachment_alt"><strong><?php _e( 'Alternative Text' ); ?></strong></label><br />
+			<input type="text" class="widefat" name="_wp_attachment_image_alt" id="attachment_alt" value="<?php echo esc_attr( $alt_text ); ?>" />
+		</p>
+	<?php endif; ?>
+
+	<?php
+		$quicktags_settings = array( 'buttons' => 'strong,em,link,block,del,ins,img,ul,ol,li,code,close' );
+		$editor_args = array(
+			'textarea_name' => 'content',
+			'textarea_rows' => 5,
+			'media_buttons' => false,
+			'tinymce' => false,
+			'quicktags' => $quicktags_settings,
+		);
+	?>
+
+	<label for="attachment_content"><strong><?php _e( 'Description' ); ?></strong><?php
+	if ( preg_match( '#^(audio|video)/#', $post->post_mime_type ) ) {
+		echo ': ' . __( 'Displayed on attachment pages.' );
+	} ?></label>
+	<?php wp_editor( $post->post_content, 'attachment_content', $editor_args ); ?>
+
+	</div>
+	<?php
+	$extras = get_compat_media_markup( $post->ID );
+	echo $extras['item'];
+	echo '<input type="hidden" id="image-edit-context" value="edit-attachment" />' . "\n";
+}
+
+/**
+ * Displays non-editable attachment metadata in the publish meta box.
+ *
+ * @since 3.5.0
+ */
+function attachment_submitbox_metadata() {
+	$post = get_post();
+
+	$file = get_attached_file( $post->ID );
+	$filename = esc_html( wp_basename( $file ) );
+
+	$media_dims = '';
+	$meta = wp_get_attachment_metadata( $post->ID );
+	if ( isset( $meta['width'], $meta['height'] ) )
+		$media_dims .= "<span id='media-dims-$post->ID'>{$meta['width']}&nbsp;&times;&nbsp;{$meta['height']}</span> ";
+	/** This filter is documented in wp-admin/includes/media.php */
+	$media_dims = apply_filters( 'media_meta', $media_dims, $post );
+
+	$att_url = wp_get_attachment_url( $post->ID );
+?>
+	<div class="misc-pub-section misc-pub-attachment">
+		<label for="attachment_url"><?php _e( 'File URL:' ); ?></label>
+		<input type="text" class="widefat urlfield" readonly="readonly" name="attachment_url" id="attachment_url" value="<?php echo esc_attr( $att_url ); ?>" />
+	</div>
+	<div class="misc-pub-section misc-pub-filename">
+		<?php _e( 'File name:' ); ?> <strong><?php echo $filename; ?></strong>
+	</div>
+	<div class="misc-pub-section misc-pub-filetype">
+		<?php _e( 'File type:' ); ?> <strong><?php
+			if ( preg_match( '/^.*?\.(\w+)$/', get_attached_file( $post->ID ), $matches ) ) {
+				echo esc_html( strtoupper( $matches[1] ) );
+				list( $mime_type ) = explode( '/', $post->post_mime_type );
+				if ( $mime_type !== 'image' && ! empty( $meta['mime_type'] ) ) {
+					if ( $meta['mime_type'] !== "$mime_type/" . strtolower( $matches[1] ) ) {
+						echo ' (' . $meta['mime_type'] . ')';
+					}
+				}
+			} else {
+				echo strtoupper( str_replace( 'image/', '', $post->post_mime_type ) );
+			}
+		?></strong>
+	</div>
+
+	<?php
+		$file_size = false;
+
+		if ( isset( $meta['filesize'] ) )
+			$file_size = $meta['filesize'];
+		elseif ( file_exists( $file ) )
+			$file_size = filesize( $file );
+
+		if ( ! empty( $file_size ) ) : ?>
+			<div class="misc-pub-section misc-pub-filesize">
+				<?php _e( 'File size:' ); ?> <strong><?php echo size_format( $file_size ); ?></strong>
+			</div>
+			<?php
+		endif;
+
+	if ( preg_match( '#^(audio|video)/#', $post->post_mime_type ) ) {
+
+		/**
+		 * Filters the audio and video metadata fields to be shown in the publish meta box.
+		 *
+		 * The key for each item in the array should correspond to an attachment
+		 * metadata key, and the value should be the desired label.
+		 *
+		 * @since 3.7.0
+		 *
+		 * @param array $fields An array of the attachment metadata keys and labels.
+		 */
+		$fields = apply_filters( 'media_submitbox_misc_sections', array(
+			'length_formatted' => __( 'Length:' ),
+			'bitrate'          => __( 'Bitrate:' ),
+		) );
+
+		foreach ( $fields as $key => $label ) {
+			if ( empty( $meta[ $key ] ) ) {
+				continue;
+			}
+	?>
+		<div class="misc-pub-section misc-pub-mime-meta misc-pub-<?php echo sanitize_html_class( $key ); ?>">
+			<?php echo $label ?> <strong><?php
+				switch ( $key ) {
+					case 'bitrate' :
+						echo round( $meta['bitrate'] / 1000 ) . 'kb/s';
+						if ( ! empty( $meta['bitrate_mode'] ) ) {
+							echo ' ' . strtoupper( esc_html( $meta['bitrate_mode'] ) );
+						}
+						break;
+					default:
+						echo esc_html( $meta[ $key ] );
+						break;
+				}
+			?></strong>
+		</div>
+	<?php
+		}
+
+		/**
+		 * Filters the audio attachment metadata fields to be shown in the publish meta box.
+		 *
+		 * The key for each item in the array should correspond to an attachment
+		 * metadata key, and the value should be the desired label.
+		 *
+		 * @since 3.7.0
+		 *
+		 * @param array $fields An array of the attachment metadata keys and labels.
+		 */
+		$audio_fields = apply_filters( 'audio_submitbox_misc_sections', array(
+			'dataformat' => __( 'Audio Format:' ),
+			'codec'      => __( 'Audio Codec:' )
+		) );
+
+		foreach ( $audio_fields as $key => $label ) {
+			if ( empty( $meta['audio'][ $key ] ) ) {
+				continue;
+			}
+	?>
+		<div class="misc-pub-section misc-pub-audio misc-pub-<?php echo sanitize_html_class( $key ); ?>">
+			<?php echo $label; ?> <strong><?php echo esc_html( $meta['audio'][$key] ); ?></strong>
+		</div>
+	<?php
+		}
+
+	}
+
+	if ( $media_dims ) : ?>
+	<div class="misc-pub-section misc-pub-dimensions">
+		<?php _e( 'Dimensions:' ); ?> <strong><?php echo $media_dims; ?></strong>
+	</div>
+<?php
+	endif;
+}
+
+/**
+ * Parse ID3v2, ID3v1, and getID3 comments to extract usable data
+ *
+ * @since 3.6.0
+ *
+ * @param array $metadata An existing array with data
+ * @param array $data Data supplied by ID3 tags
+ */
+function wp_add_id3_tag_data( &$metadata, $data ) {
+	foreach ( array( 'id3v2', 'id3v1' ) as $version ) {
+		if ( ! empty( $data[$version]['comments'] ) ) {
+			foreach ( $data[$version]['comments'] as $key => $list ) {
+				if ( 'length' !== $key && ! empty( $list ) ) {
+					$metadata[$key] = reset( $list );
+					// Fix bug in byte stream analysis.
+					if ( 'terms_of_use' === $key && 0 === strpos( $metadata[$key], 'yright notice.' ) )
+						$metadata[$key] = 'Cop' . $metadata[$key];
+				}
+			}
+			break;
+		}
+	}
+
+	if ( ! empty( $data['id3v2']['APIC'] ) ) {
+		$image = reset( $data['id3v2']['APIC']);
+		if ( ! empty( $image['data'] ) ) {
+			$metadata['image'] = array(
+				'data' => $image['data'],
+				'mime' => $image['image_mime'],
+				'width' => $image['image_width'],
+				'height' => $image['image_height']
+			);
+		}
+	} elseif ( ! empty( $data['comments']['picture'] ) ) {
+		$image = reset( $data['comments']['picture'] );
+		if ( ! empty( $image['data'] ) ) {
+			$metadata['image'] = array(
+				'data' => $image['data'],
+				'mime' => $image['image_mime']
+			);
+		}
+	}
+}
+
+/**
+ * Retrieve metadata from a video file's ID3 tags
+ *
+ * @since 3.6.0
+ *
+ * @param string $file Path to file.
+ * @return array|bool Returns array of metadata, if found.
+ */
+function wp_read_video_metadata( $file ) {
+	if ( ! file_exists( $file ) ) {
+		return false;
+	}
+
+	$metadata = array();
+
+	if ( ! defined( 'GETID3_TEMP_DIR' ) ) {
+		define( 'GETID3_TEMP_DIR', get_temp_dir() );
+	}
+
+	if ( ! class_exists( 'getID3', false ) ) {
+		require( ABSPATH . WPINC . '/ID3/getid3.php' );
+	}
+	$id3 = new getID3();
+	$data = $id3->analyze( $file );
+
+	if ( isset( $data['video']['lossless'] ) )
+		$metadata['lossless'] = $data['video']['lossless'];
+	if ( ! empty( $data['video']['bitrate'] ) )
+		$metadata['bitrate'] = (int) $data['video']['bitrate'];
+	if ( ! empty( $data['video']['bitrate_mode'] ) )
+		$metadata['bitrate_mode'] = $data['video']['bitrate_mode'];
+	if ( ! empty( $data['filesize'] ) )
+		$metadata['filesize'] = (int) $data['filesize'];
+	if ( ! empty( $data['mime_type'] ) )
+		$metadata['mime_type'] = $data['mime_type'];
+	if ( ! empty( $data['playtime_seconds'] ) )
+		$metadata['length'] = (int) round( $data['playtime_seconds'] );
+	if ( ! empty( $data['playtime_string'] ) )
+		$metadata['length_formatted'] = $data['playtime_string'];
+	if ( ! empty( $data['video']['resolution_x'] ) )
+		$metadata['width'] = (int) $data['video']['resolution_x'];
+	if ( ! empty( $data['video']['resolution_y'] ) )
+		$metadata['height'] = (int) $data['video']['resolution_y'];
+	if ( ! empty( $data['fileformat'] ) )
+		$metadata['fileformat'] = $data['fileformat'];
+	if ( ! empty( $data['video']['dataformat'] ) )
+		$metadata['dataformat'] = $data['video']['dataformat'];
+	if ( ! empty( $data['video']['encoder'] ) )
+		$metadata['encoder'] = $data['video']['encoder'];
+	if ( ! empty( $data['video']['codec'] ) )
+		$metadata['codec'] = $data['video']['codec'];
+
+	if ( ! empty( $data['audio'] ) ) {
+		unset( $data['audio']['streams'] );
+		$metadata['audio'] = $data['audio'];
+	}
+
+	wp_add_id3_tag_data( $metadata, $data );
+
+	return $metadata;
+}
+
+/**
+ * Retrieve metadata from a audio file's ID3 tags
+ *
+ * @since 3.6.0
+ *
+ * @param string $file Path to file.
+ * @return array|bool Returns array of metadata, if found.
+ */
+function wp_read_audio_metadata( $file ) {
+	if ( ! file_exists( $file ) ) {
+		return false;
+	}
+	$metadata = array();
+
+	if ( ! defined( 'GETID3_TEMP_DIR' ) ) {
+		define( 'GETID3_TEMP_DIR', get_temp_dir() );
+	}
+
+	if ( ! class_exists( 'getID3', false ) ) {
+		require( ABSPATH . WPINC . '/ID3/getid3.php' );
+	}
+	$id3 = new getID3();
+	$data = $id3->analyze( $file );
+
+	if ( ! empty( $data['audio'] ) ) {
+		unset( $data['audio']['streams'] );
+		$metadata = $data['audio'];
+	}
+
+	if ( ! empty( $data['fileformat'] ) )
+		$metadata['fileformat'] = $data['fileformat'];
+	if ( ! empty( $data['filesize'] ) )
+		$metadata['filesize'] = (int) $data['filesize'];
+	if ( ! empty( $data['mime_type'] ) )
+		$metadata['mime_type'] = $data['mime_type'];
+	if ( ! empty( $data['playtime_seconds'] ) )
+		$metadata['length'] = (int) round( $data['playtime_seconds'] );
+	if ( ! empty( $data['playtime_string'] ) )
+		$metadata['length_formatted'] = $data['playtime_string'];
+
+	wp_add_id3_tag_data( $metadata, $data );
+
+	return $metadata;
+}
+
+/**
+ * Encapsulate logic for Attach/Detach actions
+ *
+ * @since 4.2.0
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @param int    $parent_id Attachment parent ID.
+ * @param string $action    Optional. Attach/detach action. Accepts 'attach' or 'detach'.
+ *                          Default 'attach'.
+ */
+function wp_media_attach_action( $parent_id, $action = 'attach' ) {
+	global $wpdb;
+
+	if ( ! $parent_id ) {
+		return;
+	}
+
+	if ( ! current_user_can( 'edit_post', $parent_id ) ) {
+		wp_die( __( 'Sorry, you are not allowed to edit this post.' ) );
+	}
+	$ids = array();
+	foreach ( (array) $_REQUEST['media'] as $att_id ) {
+		$att_id = (int) $att_id;
+
+		if ( ! current_user_can( 'edit_post', $att_id ) ) {
+			continue;
+		}
 
-add_action( 'media_upload_image', 'wp_media_upload_handler' );
-add_action( 'media_upload_audio', 'wp_media_upload_handler' );
-add_action( 'media_upload_video', 'wp_media_upload_handler' );
-add_action( 'media_upload_file',  'wp_media_upload_handler' );
+		$ids[] = $att_id;
+	}
 
-add_filter( 'media_upload_gallery', 'media_upload_gallery' );
-add_filter( 'media_upload_library', 'media_upload_library' );
+	if ( ! empty( $ids ) ) {
+		$ids_string = implode( ',', $ids );
+		if ( 'attach' === $action ) {
+			$result = $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET post_parent = %d WHERE post_type = 'attachment' AND ID IN ( $ids_string )", $parent_id ) );
+		} else {
+			$result = $wpdb->query( "UPDATE $wpdb->posts SET post_parent = 0 WHERE post_type = 'attachment' AND ID IN ( $ids_string )" );
+		}
+
+		foreach ( $ids as $att_id ) {
+			clean_attachment_cache( $att_id );
+		}
+	}
+
+	if ( isset( $result ) ) {
+		$location = 'upload.php';
+		if ( $referer = wp_get_referer() ) {
+			if ( false !== strpos( $referer, 'upload.php' ) ) {
+				$location = remove_query_arg( array( 'attached', 'detach' ), $referer );
+			}
+		}
+
+		$key = 'attach' === $action ? 'attached' : 'detach';
+		$location = add_query_arg( array( $key => $result ), $location );
+		wp_redirect( $location );
+		exit;
+	}
+}