WordPress 4.4
[autoinstalls/wordpress.git] / wp-admin / includes / meta-boxes.php
index 9f7f469a427bc6ee48d6ad5088f94368f1b23a8c..1627b1f577962a65e018615d7b3c01d09e74cd8b 100644 (file)
@@ -3,13 +3,23 @@
 // -- Post related Meta Boxes
 
 /**
- * Display post submit form fields.
+ * Displays post submit form fields.
  *
  * @since 2.7.0
  *
- * @param object $post
+ * @global string $action
+ *
+ * @param WP_Post  $post Current post object.
+ * @param array    $args {
+ *     Array of arguments for building the post submit meta box.
+ *
+ *     @type string   $id       Meta box ID.
+ *     @type string   $title    Meta box title.
+ *     @type callable $callback Meta box display callback.
+ *     @type array    $args     Extra meta box arguments.
+ * }
  */
-function post_submit_meta_box($post, $args = array() ) {
+function post_submit_meta_box( $post, $args = array() ) {
        global $action;
 
        $post_type = $post->post_type;
@@ -29,27 +39,19 @@ function post_submit_meta_box($post, $args = array() ) {
 <div id="save-action">
 <?php if ( 'publish' != $post->post_status && 'future' != $post->post_status && 'pending' != $post->post_status ) { ?>
 <input <?php if ( 'private' == $post->post_status ) { ?>style="display:none"<?php } ?> type="submit" name="save" id="save-post" value="<?php esc_attr_e('Save Draft'); ?>" class="button" />
+<span class="spinner"></span>
 <?php } elseif ( 'pending' == $post->post_status && $can_publish ) { ?>
 <input type="submit" name="save" id="save-post" value="<?php esc_attr_e('Save as Pending'); ?>" class="button" />
-<?php } ?>
 <span class="spinner"></span>
+<?php } ?>
 </div>
-<?php if ( $post_type_object->public ) : ?>
+<?php if ( is_post_type_viewable( $post_type_object ) ) : ?>
 <div id="preview-action">
 <?php
+$preview_link = esc_url( get_preview_post_link( $post ) );
 if ( 'publish' == $post->post_status ) {
-       $preview_link = esc_url( get_permalink( $post->ID ) );
        $preview_button = __( 'Preview Changes' );
 } else {
-       $preview_link = set_url_scheme( get_permalink( $post->ID ) );
-       /**
-        * Filter the URI of a post preview in the post submit box.
-        *
-        * @since 2.0.5
-        *
-        * @param string $preview_link URI the user will be directed to for a post preview.
-        */
-       $preview_link = esc_url( apply_filters( 'preview_post_link', add_query_arg( 'preview', 'true', $preview_link ) ) );
        $preview_button = __( 'Preview' );
 }
 ?>
@@ -57,6 +59,16 @@ if ( 'publish' == $post->post_status ) {
 <input type="hidden" name="wp-preview" id="wp-preview" value="" />
 </div>
 <?php endif; // public post type ?>
+<?php
+/**
+ * Fires before the post time/date setting in the Publish meta box.
+ *
+ * @since 4.4.0
+ *
+ * @param WP_Post $post WP_Post object for the current post.
+ */
+do_action( 'post_submitbox_minor_actions', $post );
+?>
 <div class="clear"></div>
 </div><!-- #minor-publishing-actions -->
 
@@ -159,15 +171,15 @@ echo esc_html( $visibility_trans ); ?></span>
 
 <?php
 /* translators: Publish box date format, see http://php.net/date */
-$datef = __( 'M j, Y @ G:i' );
+$datef = __( 'M j, Y @ H:i' );
 if ( 0 != $post->ID ) {
        if ( 'future' == $post->post_status ) { // scheduled for publishing at a future date
                $stamp = __('Scheduled for: <b>%1$s</b>');
-       } else if ( 'publish' == $post->post_status || 'private' == $post->post_status ) { // already published
+       } elseif ( 'publish' == $post->post_status || 'private' == $post->post_status ) { // already published
                $stamp = __('Published on: <b>%1$s</b>');
-       } else if ( '0000-00-00 00:00:00' == $post->post_date_gmt ) { // draft, 1 or more saves, no date specified
+       } elseif ( '0000-00-00 00:00:00' == $post->post_date_gmt ) { // draft, 1 or more saves, no date specified
                $stamp = __('Publish <b>immediately</b>');
-       } else if ( time() < strtotime( $post->post_date_gmt . ' +0000' ) ) { // draft, 1 or more saves, future date specified
+       } elseif ( time() < strtotime( $post->post_date_gmt . ' +0000' ) ) { // draft, 1 or more saves, future date specified
                $stamp = __('Schedule for: <b>%1$s</b>');
        } else { // draft, 1 or more saves, date specified
                $stamp = __('Publish on: <b>%1$s</b>');
@@ -201,7 +213,10 @@ if ( $can_publish ) : // Contributors don't get to choose the date of publish ?>
        <span id="timestamp">
        <?php printf($stamp, $date); ?></span>
        <a href="#edit_timestamp" class="edit-timestamp hide-if-no-js"><span aria-hidden="true"><?php _e( 'Edit' ); ?></span> <span class="screen-reader-text"><?php _e( 'Edit date and time' ); ?></span></a>
-       <div id="timestampdiv" class="hide-if-js"><?php touch_time(($action == 'edit'), 1); ?></div>
+       <fieldset id="timestampdiv" class="hide-if-js">
+       <legend class="screen-reader-text"><?php _e( 'Date and time' ); ?></legend>
+       <?php touch_time( ( $action === 'edit' ), 1 ); ?>
+       </fieldset>
 </div><?php // /misc-pub-section ?>
 <?php endif; ?>
 
@@ -210,8 +225,11 @@ if ( $can_publish ) : // Contributors don't get to choose the date of publish ?>
  * Fires after the post time/date setting in the Publish meta box.
  *
  * @since 2.9.0
+ * @since 4.4.0 Added the `$post` parameter.
+ *
+ * @param WP_Post $post WP_Post object for the current post.
  */
-do_action( 'post_submitbox_misc_actions' );
+do_action( 'post_submitbox_misc_actions', $post );
 ?>
 </div>
 <div class="clear"></div>
@@ -245,19 +263,19 @@ if ( !in_array( $post->post_status, array('publish', 'future', 'private') ) || 0
        if ( $can_publish ) :
                if ( !empty($post->post_date_gmt) && time() < strtotime( $post->post_date_gmt . ' +0000' ) ) : ?>
                <input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Schedule') ?>" />
-               <?php submit_button( __( 'Schedule' ), 'primary button-large', 'publish', false, array( 'accesskey' => 'p' ) ); ?>
+               <?php submit_button( __( 'Schedule' ), 'primary button-large', 'publish', false ); ?>
 <?php  else : ?>
                <input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Publish') ?>" />
-               <?php submit_button( __( 'Publish' ), 'primary button-large', 'publish', false, array( 'accesskey' => 'p' ) ); ?>
+               <?php submit_button( __( 'Publish' ), 'primary button-large', 'publish', false ); ?>
 <?php  endif;
        else : ?>
                <input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Submit for Review') ?>" />
-               <?php submit_button( __( 'Submit for Review' ), 'primary button-large', 'publish', false, array( 'accesskey' => 'p' ) ); ?>
+               <?php submit_button( __( 'Submit for Review' ), 'primary button-large', 'publish', false ); ?>
 <?php
        endif;
 } else { ?>
                <input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Update') ?>" />
-               <input name="save" type="submit" class="button button-primary button-large" id="publish" accesskey="p" value="<?php esc_attr_e('Update') ?>" />
+               <input name="save" type="submit" class="button button-primary button-large" id="publish" value="<?php esc_attr_e( 'Update' ) ?>" />
 <?php
 } ?>
 </div>
@@ -276,11 +294,6 @@ if ( !in_array( $post->post_status, array('publish', 'future', 'private') ) || 0
  * @param object $post
  */
 function attachment_submit_meta_box( $post ) {
-       global $action;
-
-       $post_type = $post->post_type;
-       $post_type_object = get_post_type_object($post_type);
-       $can_publish = current_user_can($post_type_object->cap->publish_posts);
 ?>
 <div class="submitbox" id="submitpost">
 
@@ -295,7 +308,7 @@ function attachment_submit_meta_box( $post ) {
 <div id="misc-publishing-actions">
        <?php
        /* translators: Publish box date format, see http://php.net/date */
-       $datef = __( 'M j, Y @ G:i' );
+       $datef = __( 'M j, Y @ H:i' );
        $stamp = __('Uploaded on: <b>%1$s</b>');
        $date = date_i18n( $datef, strtotime( $post->post_date ) );
        ?>
@@ -332,7 +345,7 @@ function attachment_submit_meta_box( $post ) {
        <div id="publishing-action">
                <span class="spinner"></span>
                <input name="original_publish" type="hidden" id="original_publish" value="<?php esc_attr_e('Update') ?>" />
-               <input name="save" type="submit" class="button-primary button-large" id="publish" accesskey="p" value="<?php esc_attr_e('Update') ?>" />
+               <input name="save" type="submit" class="button-primary button-large" id="publish" value="<?php esc_attr_e( 'Update' ) ?>" />
        </div>
        <div class="clear"></div>
 </div><!-- #major-publishing-actions -->
@@ -347,7 +360,15 @@ function attachment_submit_meta_box( $post ) {
  *
  * @since 3.1.0
  *
- * @param object $post
+ * @param WP_Post $post Post object.
+ * @param array   $box {
+ *     Post formats meta box arguments.
+ *
+ *     @type string   $id       Meta box ID.
+ *     @type string   $title    Meta box title.
+ *     @type callable $callback Meta box display callback.
+ *     @type array    $args     Extra meta box arguments.
+ * }
  */
 function post_format_meta_box( $post, $box ) {
        if ( current_theme_supports( 'post-formats' ) && post_type_supports( $post->post_type, 'post-formats' ) ) :
@@ -362,10 +383,13 @@ function post_format_meta_box( $post, $box ) {
                        $post_formats[0][] = $post_format;
        ?>
        <div id="post-formats-select">
-               <input type="radio" name="post_format" class="post-format" id="post-format-0" value="0" <?php checked( $post_format, '0' ); ?> /> <label for="post-format-0" class="post-format-icon post-format-standard"><?php echo get_post_format_string( 'standard' ); ?></label>
-               <?php foreach ( $post_formats[0] as $format ) : ?>
-               <br /><input type="radio" name="post_format" class="post-format" id="post-format-<?php echo esc_attr( $format ); ?>" value="<?php echo esc_attr( $format ); ?>" <?php checked( $post_format, $format ); ?> /> <label for="post-format-<?php echo esc_attr( $format ); ?>" class="post-format-icon post-format-<?php echo esc_attr( $format ); ?>"><?php echo esc_html( get_post_format_string( $format ) ); ?></label>
-               <?php endforeach; ?><br />
+               <fieldset>
+                       <legend class="screen-reader-text"><?php _e( 'Post Formats' ); ?></legend>
+                       <input type="radio" name="post_format" class="post-format" id="post-format-0" value="0" <?php checked( $post_format, '0' ); ?> /> <label for="post-format-0" class="post-format-icon post-format-standard"><?php echo get_post_format_string( 'standard' ); ?></label>
+                       <?php foreach ( $post_formats[0] as $format ) : ?>
+                       <br /><input type="radio" name="post_format" class="post-format" id="post-format-<?php echo esc_attr( $format ); ?>" value="<?php echo esc_attr( $format ); ?>" <?php checked( $post_format, $format ); ?> /> <label for="post-format-<?php echo esc_attr( $format ); ?>" class="post-format-icon post-format-<?php echo esc_attr( $format ); ?>"><?php echo esc_html( get_post_format_string( $format ) ); ?></label>
+                       <?php endforeach; ?>
+               </fieldset>
        </div>
        <?php endif; endif;
 }
@@ -375,33 +399,52 @@ function post_format_meta_box( $post, $box ) {
  *
  * @since 2.6.0
  *
- * @param object $post
+ * @todo Create taxonomy-agnostic wrapper for this.
+ *
+ * @param WP_Post $post Post object.
+ * @param array   $box {
+ *     Tags meta box arguments.
+ *
+ *     @type string   $id       Meta box ID.
+ *     @type string   $title    Meta box title.
+ *     @type callable $callback Meta box display callback.
+ *     @type array    $args {
+ *         Extra meta box arguments.
+ *
+ *         @type string $taxonomy Taxonomy. Default 'post_tag'.
+ *     }
+ * }
  */
-function post_tags_meta_box($post, $box) {
-       $defaults = array('taxonomy' => 'post_tag');
-       if ( !isset($box['args']) || !is_array($box['args']) )
+function post_tags_meta_box( $post, $box ) {
+       $defaults = array( 'taxonomy' => 'post_tag' );
+       if ( ! isset( $box['args'] ) || ! is_array( $box['args'] ) ) {
                $args = array();
-       else
+       } else {
                $args = $box['args'];
-       extract( wp_parse_args($args, $defaults), EXTR_SKIP );
-       $tax_name = esc_attr($taxonomy);
-       $taxonomy = get_taxonomy($taxonomy);
+       }
+       $r = wp_parse_args( $args, $defaults );
+       $tax_name = esc_attr( $r['taxonomy'] );
+       $taxonomy = get_taxonomy( $r['taxonomy'] );
        $user_can_assign_terms = current_user_can( $taxonomy->cap->assign_terms );
        $comma = _x( ',', 'tag delimiter' );
+       $terms_to_edit = get_terms_to_edit( $post->ID, $tax_name );
+       if ( ! is_string( $terms_to_edit ) ) {
+               $terms_to_edit = '';
+       }
 ?>
 <div class="tagsdiv" id="<?php echo $tax_name; ?>">
        <div class="jaxtag">
        <div class="nojs-tags hide-if-js">
-       <p><?php echo $taxonomy->labels->add_or_remove_items; ?></p>
-       <textarea name="<?php echo "tax_input[$tax_name]"; ?>" rows="3" cols="20" class="the-tags" id="tax-input-<?php echo $tax_name; ?>" <?php disabled( ! $user_can_assign_terms ); ?>><?php echo str_replace( ',', $comma . ' ', get_terms_to_edit( $post->ID, $tax_name ) ); // textarea_escaped by esc_attr() ?></textarea></div>
+               <label for="tax-input-<?php echo $tax_name; ?>"><?php echo $taxonomy->labels->add_or_remove_items; ?></label>
+               <p><textarea name="<?php echo "tax_input[$tax_name]"; ?>" rows="3" cols="20" class="the-tags" id="tax-input-<?php echo $tax_name; ?>" <?php disabled( ! $user_can_assign_terms ); ?> aria-describedby="new-tag-<?php echo $tax_name; ?>-desc"><?php echo str_replace( ',', $comma . ' ', $terms_to_edit ); // textarea_escaped by esc_attr() ?></textarea></p>
+       </div>
        <?php if ( $user_can_assign_terms ) : ?>
        <div class="ajaxtag hide-if-no-js">
-               <label class="screen-reader-text" for="new-tag-<?php echo $tax_name; ?>"><?php echo $box['title']; ?></label>
-               <div class="taghint"><?php echo $taxonomy->labels->add_new_item; ?></div>
-               <p><input type="text" id="new-tag-<?php echo $tax_name; ?>" name="newtag[<?php echo $tax_name; ?>]" class="newtag form-input-tip" size="16" autocomplete="off" value="" />
+               <label class="screen-reader-text" for="new-tag-<?php echo $tax_name; ?>"><?php echo $taxonomy->labels->add_new_item; ?></label>
+               <p><input type="text" id="new-tag-<?php echo $tax_name; ?>" name="newtag[<?php echo $tax_name; ?>]" class="newtag form-input-tip" size="16" autocomplete="off" aria-describedby="new-tag-<?php echo $tax_name; ?>-desc" value="" />
                <input type="button" class="button tagadd" value="<?php esc_attr_e('Add'); ?>" /></p>
        </div>
-       <p class="howto"><?php echo $taxonomy->labels->separate_items_with_commas; ?></p>
+       <p class="howto" id="new-tag-<?php echo $tax_name; ?>-desc"><?php echo $taxonomy->labels->separate_items_with_commas; ?></p>
        <?php endif; ?>
        </div>
        <div class="tagchecklist"></div>
@@ -417,59 +460,109 @@ function post_tags_meta_box($post, $box) {
  *
  * @since 2.6.0
  *
- * @param object $post
+ * @todo Create taxonomy-agnostic wrapper for this.
+ *
+ * @param WP_Post $post Post object.
+ * @param array   $box {
+ *     Categories meta box arguments.
+ *
+ *     @type string   $id       Meta box ID.
+ *     @type string   $title    Meta box title.
+ *     @type callable $callback Meta box display callback.
+ *     @type array    $args {
+ *         Extra meta box arguments.
+ *
+ *         @type string $taxonomy Taxonomy. Default 'category'.
+ *     }
+ * }
  */
 function post_categories_meta_box( $post, $box ) {
-       $defaults = array('taxonomy' => 'category');
-       if ( !isset($box['args']) || !is_array($box['args']) )
+       $defaults = array( 'taxonomy' => 'category' );
+       if ( ! isset( $box['args'] ) || ! is_array( $box['args'] ) ) {
                $args = array();
-       else
+       } else {
                $args = $box['args'];
-       extract( wp_parse_args($args, $defaults), EXTR_SKIP );
-       $tax = get_taxonomy($taxonomy);
-
+       }
+       $r = wp_parse_args( $args, $defaults );
+       $tax_name = esc_attr( $r['taxonomy'] );
+       $taxonomy = get_taxonomy( $r['taxonomy'] );
        ?>
-       <div id="taxonomy-<?php echo $taxonomy; ?>" class="categorydiv">
-               <ul id="<?php echo $taxonomy; ?>-tabs" class="category-tabs">
-                       <li class="tabs"><a href="#<?php echo $taxonomy; ?>-all"><?php echo $tax->labels->all_items; ?></a></li>
-                       <li class="hide-if-no-js"><a href="#<?php echo $taxonomy; ?>-pop"><?php _e( 'Most Used' ); ?></a></li>
+       <div id="taxonomy-<?php echo $tax_name; ?>" class="categorydiv">
+               <ul id="<?php echo $tax_name; ?>-tabs" class="category-tabs">
+                       <li class="tabs"><a href="#<?php echo $tax_name; ?>-all"><?php echo $taxonomy->labels->all_items; ?></a></li>
+                       <li class="hide-if-no-js"><a href="#<?php echo $tax_name; ?>-pop"><?php _e( 'Most Used' ); ?></a></li>
                </ul>
 
-               <div id="<?php echo $taxonomy; ?>-pop" class="tabs-panel" style="display: none;">
-                       <ul id="<?php echo $taxonomy; ?>checklist-pop" class="categorychecklist form-no-clear" >
-                               <?php $popular_ids = wp_popular_terms_checklist($taxonomy); ?>
+               <div id="<?php echo $tax_name; ?>-pop" class="tabs-panel" style="display: none;">
+                       <ul id="<?php echo $tax_name; ?>checklist-pop" class="categorychecklist form-no-clear" >
+                               <?php $popular_ids = wp_popular_terms_checklist( $tax_name ); ?>
                        </ul>
                </div>
 
-               <div id="<?php echo $taxonomy; ?>-all" class="tabs-panel">
+               <div id="<?php echo $tax_name; ?>-all" class="tabs-panel">
                        <?php
-            $name = ( $taxonomy == 'category' ) ? 'post_category' : 'tax_input[' . $taxonomy . ']';
-            echo "<input type='hidden' name='{$name}[]' value='0' />"; // Allows for an empty term set to be sent. 0 is an invalid Term ID and will be ignored by empty() checks.
-            ?>
-                       <ul id="<?php echo $taxonomy; ?>checklist" data-wp-lists="list:<?php echo $taxonomy?>" class="categorychecklist form-no-clear">
-                               <?php wp_terms_checklist($post->ID, array( 'taxonomy' => $taxonomy, 'popular_cats' => $popular_ids ) ) ?>
+                       $name = ( $tax_name == 'category' ) ? 'post_category' : 'tax_input[' . $tax_name . ']';
+                       echo "<input type='hidden' name='{$name}[]' value='0' />"; // Allows for an empty term set to be sent. 0 is an invalid Term ID and will be ignored by empty() checks.
+                       ?>
+                       <ul id="<?php echo $tax_name; ?>checklist" data-wp-lists="list:<?php echo $tax_name; ?>" class="categorychecklist form-no-clear">
+                               <?php wp_terms_checklist( $post->ID, array( 'taxonomy' => $tax_name, 'popular_cats' => $popular_ids ) ); ?>
                        </ul>
                </div>
-       <?php if ( current_user_can($tax->cap->edit_terms) ) : ?>
-                       <div id="<?php echo $taxonomy; ?>-adder" class="wp-hidden-children">
-                               <h4>
-                                       <a id="<?php echo $taxonomy; ?>-add-toggle" href="#<?php echo $taxonomy; ?>-add" class="hide-if-no-js">
-                                               <?php
-                                                       /* translators: %s: add new taxonomy label */
-                                                       printf( __( '+ %s' ), $tax->labels->add_new_item );
-                                               ?>
-                                       </a>
-                               </h4>
-                               <p id="<?php echo $taxonomy; ?>-add" class="category-add wp-hidden-child">
-                                       <label class="screen-reader-text" for="new<?php echo $taxonomy; ?>"><?php echo $tax->labels->add_new_item; ?></label>
-                                       <input type="text" name="new<?php echo $taxonomy; ?>" id="new<?php echo $taxonomy; ?>" class="form-required form-input-tip" value="<?php echo esc_attr( $tax->labels->new_item_name ); ?>" aria-required="true"/>
-                                       <label class="screen-reader-text" for="new<?php echo $taxonomy; ?>_parent">
-                                               <?php echo $tax->labels->parent_item_colon; ?>
+       <?php if ( current_user_can( $taxonomy->cap->edit_terms ) ) : ?>
+                       <div id="<?php echo $tax_name; ?>-adder" class="wp-hidden-children">
+                               <a id="<?php echo $tax_name; ?>-add-toggle" href="#<?php echo $tax_name; ?>-add" class="hide-if-no-js taxonomy-add-new">
+                                       <?php
+                                               /* translators: %s: add new taxonomy label */
+                                               printf( __( '+ %s' ), $taxonomy->labels->add_new_item );
+                                       ?>
+                               </a>
+                               <p id="<?php echo $tax_name; ?>-add" class="category-add wp-hidden-child">
+                                       <label class="screen-reader-text" for="new<?php echo $tax_name; ?>"><?php echo $taxonomy->labels->add_new_item; ?></label>
+                                       <input type="text" name="new<?php echo $tax_name; ?>" id="new<?php echo $tax_name; ?>" class="form-required form-input-tip" value="<?php echo esc_attr( $taxonomy->labels->new_item_name ); ?>" aria-required="true"/>
+                                       <label class="screen-reader-text" for="new<?php echo $tax_name; ?>_parent">
+                                               <?php echo $taxonomy->labels->parent_item_colon; ?>
                                        </label>
-                                       <?php wp_dropdown_categories( array( 'taxonomy' => $taxonomy, 'hide_empty' => 0, 'name' => 'new'.$taxonomy.'_parent', 'orderby' => 'name', 'hierarchical' => 1, 'show_option_none' => '&mdash; ' . $tax->labels->parent_item . ' &mdash;' ) ); ?>
-                                       <input type="button" id="<?php echo $taxonomy; ?>-add-submit" data-wp-lists="add:<?php echo $taxonomy ?>checklist:<?php echo $taxonomy ?>-add" class="button category-add-submit" value="<?php echo esc_attr( $tax->labels->add_new_item ); ?>" />
-                                       <?php wp_nonce_field( 'add-'.$taxonomy, '_ajax_nonce-add-'.$taxonomy, false ); ?>
-                                       <span id="<?php echo $taxonomy; ?>-ajax-response"></span>
+                                       <?php
+                                       $parent_dropdown_args = array(
+                                               'taxonomy'         => $tax_name,
+                                               'hide_empty'       => 0,
+                                               'name'             => 'new' . $tax_name . '_parent',
+                                               'orderby'          => 'name',
+                                               'hierarchical'     => 1,
+                                               'show_option_none' => '&mdash; ' . $taxonomy->labels->parent_item . ' &mdash;',
+                                       );
+
+                                       /**
+                                        * Filter the arguments for the taxonomy parent dropdown on the Post Edit page.
+                                        *
+                                        * @since 4.4.0
+                                        *
+                                        * @param array $parent_dropdown_args {
+                                        *     Optional. Array of arguments to generate parent dropdown.
+                                        *
+                                        *     @type string   $taxonomy         Name of the taxonomy to retrieve.
+                                        *     @type bool     $hide_if_empty    True to skip generating markup if no
+                                        *                                      categories are found. Default 0.
+                                        *     @type string   $name             Value for the 'name' attribute
+                                        *                                      of the select element.
+                                        *                                      Default "new{$tax_name}_parent".
+                                        *     @type string   $orderby          Which column to use for ordering
+                                        *                                      terms. Default 'name'.
+                                        *     @type bool|int $hierarchical     Whether to traverse the taxonomy
+                                        *                                      hierarchy. Default 1.
+                                        *     @type string   $show_option_none Text to display for the "none" option.
+                                        *                                      Default "&mdash; {$parent} &mdash;",
+                                        *                                      where `$parent` is 'parent_item'
+                                        *                                      taxonomy label.
+                                        * }
+                                        */
+                                       $parent_dropdown_args = apply_filters( 'post_edit_category_parent_dropdown_args', $parent_dropdown_args );
+
+                                       wp_dropdown_categories( $parent_dropdown_args );
+                                       ?>
+                                       <input type="button" id="<?php echo $tax_name; ?>-add-submit" data-wp-lists="add:<?php echo $tax_name; ?>checklist:<?php echo $tax_name; ?>-add" class="button category-add-submit" value="<?php echo esc_attr( $taxonomy->labels->add_new_item ); ?>" />
+                                       <?php wp_nonce_field( 'add-' . $tax_name, '_ajax_nonce-add-' . $tax_name, false ); ?>
+                                       <span id="<?php echo $tax_name; ?>-ajax-response"></span>
                                </p>
                        </div>
                <?php endif; ?>
@@ -487,7 +580,7 @@ function post_categories_meta_box( $post, $box ) {
 function post_excerpt_meta_box($post) {
 ?>
 <label class="screen-reader-text" for="excerpt"><?php _e('Excerpt') ?></label><textarea rows="1" cols="40" name="excerpt" id="excerpt"><?php echo $post->post_excerpt; // textarea_escaped ?></textarea>
-<p><?php _e('Excerpts are optional hand-crafted summaries of your content that can be used in your theme. <a href="http://codex.wordpress.org/Excerpt" target="_blank">Learn more about manual excerpts.</a>'); ?></p>
+<p><?php _e('Excerpts are optional hand-crafted summaries of your content that can be used in your theme. <a href="https://codex.wordpress.org/Excerpt" target="_blank">Learn more about manual excerpts.</a>'); ?></p>
 <?php
 }
 
@@ -511,7 +604,7 @@ function post_trackback_meta_box($post) {
 
 ?>
 <p><label for="trackback_url"><?php _e('Send trackbacks to:'); ?></label> <?php echo $form_trackback; ?><br /> (<?php _e('Separate multiple URLs with spaces'); ?>)</p>
-<p><?php _e('Trackbacks are a way to notify legacy blog systems that you&#8217;ve linked to them. If you link other WordPress sites they&#8217;ll be notified automatically using <a href="http://codex.wordpress.org/Introduction_to_Blogging#Managing_Comments" target="_blank">pingbacks</a>, no other action necessary.'); ?></p>
+<p><?php _e('Trackbacks are a way to notify legacy blog systems that you&#8217;ve linked to them. If you link other WordPress sites, they&#8217;ll be notified automatically using <a href="https://codex.wordpress.org/Introduction_to_Blogging#Managing_Comments" target="_blank">pingbacks</a>, no other action necessary.'); ?></p>
 <?php
 if ( ! empty($pings) )
        echo $pings;
@@ -537,7 +630,7 @@ foreach ( $metadata as $key => $value ) {
 list_meta( $metadata );
 meta_form( $post ); ?>
 </div>
-<p><?php _e('Custom fields can be used to add extra metadata to a post that you can <a href="http://codex.wordpress.org/Using_Custom_Fields" target="_blank">use in your theme</a>.'); ?></p>
+<p><?php _e('Custom fields can be used to add extra metadata to a post that you can <a href="https://codex.wordpress.org/Using_Custom_Fields" target="_blank">use in your theme</a>.'); ?></p>
 <?php
 }
 
@@ -553,7 +646,7 @@ function post_comment_status_meta_box($post) {
 <input name="advanced_view" type="hidden" value="1" />
 <p class="meta-options">
        <label for="comment_status" class="selectit"><input name="comment_status" type="checkbox" id="comment_status" value="open" <?php checked($post->comment_status, 'open'); ?> /> <?php _e( 'Allow comments.' ) ?></label><br />
-       <label for="ping_status" class="selectit"><input name="ping_status" type="checkbox" id="ping_status" value="open" <?php checked($post->ping_status, 'open'); ?> /> <?php printf( __( 'Allow <a href="%s" target="_blank">trackbacks and pingbacks</a> on this page.' ), __( 'http://codex.wordpress.org/Introduction_to_Blogging#Managing_Comments' ) ); ?></label>
+       <label for="ping_status" class="selectit"><input name="ping_status" type="checkbox" id="ping_status" value="open" <?php checked($post->ping_status, 'open'); ?> /> <?php printf( __( 'Allow <a href="%s" target="_blank">trackbacks and pingbacks</a> on this page.' ), __( 'https://codex.wordpress.org/Introduction_to_Blogging#Managing_Comments' ) ); ?></label>
        <?php
        /**
         * Fires at the end of the Discussion meta box on the post editing screen.
@@ -589,8 +682,6 @@ function post_comment_meta_box_thead($result) {
  * @param object $post
  */
 function post_comment_meta_box( $post ) {
-       global $wpdb;
-
        wp_nonce_field( 'get-comments', 'add_comment_nonce', false );
        ?>
        <p class="hide-if-no-js" id="add-new-comment"><a class="button" href="#commentstatusdiv" onclick="window.commentReply && commentReply.addcomment(<?php echo $post->ID; ?>);return false;"><?php _e('Add comment'); ?></a></p>
@@ -611,7 +702,7 @@ function post_comment_meta_box( $post ) {
                }
 
                ?>
-               <p class="hide-if-no-js" id="show-comments"><a href="#commentstatusdiv" onclick="commentsBox.get(<?php echo $total; ?>);return false;"><?php _e('Show comments'); ?></a> <span class="spinner"></span></p>
+               <p class="hide-if-no-js" id="show-comments"><a href="#commentstatusdiv" onclick="commentsBox.load(<?php echo $total; ?>);return false;"><?php _e('Show comments'); ?></a> <span class="spinner"></span></p>
                <?php
        }
 
@@ -627,8 +718,9 @@ function post_comment_meta_box( $post ) {
  */
 function post_slug_meta_box($post) {
 /** This filter is documented in wp-admin/edit-tag-form.php */
+$editable_slug = apply_filters( 'editable_slug', $post->post_name, $post );
 ?>
-<label class="screen-reader-text" for="post_name"><?php _e('Slug') ?></label><input name="post_name" type="text" size="13" id="post_name" value="<?php echo esc_attr( apply_filters( 'editable_slug', $post->post_name ) ); ?>" />
+<label class="screen-reader-text" for="post_name"><?php _e('Slug') ?></label><input name="post_name" type="text" size="13" id="post_name" value="<?php echo esc_attr( $editable_slug ); ?>" />
 <?php
 }
 
@@ -637,6 +729,8 @@ function post_slug_meta_box($post) {
  *
  * @since 2.6.0
  *
+ * @global int $user_ID
+ *
  * @param object $post
  */
 function post_author_meta_box($post) {
@@ -705,20 +799,45 @@ function page_attributes_meta_box($post) {
 <?php
                } // end empty pages check
        } // end hierarchical check.
-       if ( 'page' == $post->post_type && 0 != count( get_page_templates( $post ) ) ) {
+       if ( 'page' == $post->post_type && 0 != count( get_page_templates( $post ) ) && get_option( 'page_for_posts' ) != $post->ID ) {
                $template = !empty($post->page_template) ? $post->page_template : false;
                ?>
-<p><strong><?php _e('Template') ?></strong></p>
+<p><strong><?php _e('Template') ?></strong><?php
+       /**
+        * Fires immediately after the heading inside the 'Template' section
+        * of the 'Page Attributes' meta box.
+        *
+        * @since 4.4.0
+        *
+        * @param string  $template The template used for the current post.
+        * @param WP_Post $post     The current post.
+        */
+       do_action( 'page_attributes_meta_box_template', $template, $post );
+?></p>
 <label class="screen-reader-text" for="page_template"><?php _e('Page Template') ?></label><select name="page_template" id="page_template">
-<option value='default'><?php _e('Default Template'); ?></option>
+<?php
+/**
+ * Filter the title of the default page template displayed in the drop-down.
+ *
+ * @since 4.1.0
+ *
+ * @param string $label   The display value for the default page template title.
+ * @param string $context Where the option label is displayed. Possible values
+ *                        include 'meta-box' or 'quick-edit'.
+ */
+$default_title = apply_filters( 'default_page_template_title',  __( 'Default Template' ), 'meta-box' );
+?>
+<option value="default"><?php echo esc_html( $default_title ); ?></option>
 <?php page_template_dropdown($template); ?>
 </select>
 <?php
        } ?>
 <p><strong><?php _e('Order') ?></strong></p>
 <p><label class="screen-reader-text" for="menu_order"><?php _e('Order') ?></label><input name="menu_order" type="text" size="4" id="menu_order" value="<?php echo esc_attr($post->menu_order) ?>" /></p>
-<p><?php if ( 'page' == $post->post_type ) _e( 'Need help? Use the Help tab in the upper right of your screen.' ); ?></p>
+<?php if ( 'page' == $post->post_type && get_current_screen()->get_help_tabs() ) { ?>
+<p><?php _e( 'Need help? Use the Help tab in the upper right of your screen.' ); ?></p>
 <?php
+       }
 }
 
 // -- Link related Meta Boxes
@@ -766,15 +885,15 @@ do_action( 'post_submitbox_start' );
 <div id="delete-action">
 <?php
 if ( !empty($_GET['action']) && 'edit' == $_GET['action'] && current_user_can('manage_links') ) { ?>
-       <a class="submitdelete deletion" href="<?php echo wp_nonce_url("link.php?action=delete&amp;link_id=$link->link_id", 'delete-bookmark_' . $link->link_id); ?>" onclick="if ( confirm('<?php echo esc_js(sprintf(__("You are about to delete this link '%s'\n 'Cancel' to stop, 'OK' to delete."), $link->link_name )); ?>') ) {return true;}return false;"><?php _e('Delete'); ?></a>
+       <a class="submitdelete deletion" href="<?php echo wp_nonce_url("link.php?action=delete&amp;link_id=$link->link_id", 'delete-bookmark_' . $link->link_id); ?>" onclick="if ( confirm('<?php echo esc_js(sprintf(__("You are about to delete this link '%s'\n  'Cancel' to stop, 'OK' to delete."), $link->link_name )); ?>') ) {return true;}return false;"><?php _e('Delete'); ?></a>
 <?php } ?>
 </div>
 
 <div id="publishing-action">
 <?php if ( !empty($link->link_id) ) { ?>
-       <input name="save" type="submit" class="button-large button-primary" id="publish" accesskey="p" value="<?php esc_attr_e('Update Link') ?>" />
+       <input name="save" type="submit" class="button-large button-primary" id="publish" value="<?php esc_attr_e( 'Update Link' ) ?>" />
 <?php } else { ?>
-       <input name="save" type="submit" class="button-large button-primary" id="publish" accesskey="p" value="<?php esc_attr_e('Add Link') ?>" />
+       <input name="save" type="submit" class="button-large button-primary" id="publish" value="<?php esc_attr_e( 'Add Link' ) ?>" />
 <?php } ?>
 </div>
 <div class="clear"></div>
@@ -825,7 +944,7 @@ function link_categories_meta_box($link) {
        </div>
 
        <div id="category-adder" class="wp-hidden-children">
-               <h4><a id="category-add-toggle" href="#category-add"><?php _e( '+ Add New Category' ); ?></a></h4>
+               <a id="category-add-toggle" href="#category-add" class="taxonomy-add-new"><?php _e( '+ Add New Category' ); ?></a>
                <p id="link-category-add" class="wp-hidden-child">
                        <label class="screen-reader-text" for="newcat"><?php _e( '+ Add New Category' ); ?></label>
                        <input type="text" name="newcat" id="newcat" class="form-required form-input-tip" value="<?php esc_attr_e( 'New category name' ); ?>" aria-required="true" />
@@ -866,6 +985,8 @@ function link_target_meta_box($link) { ?>
  *
  * @since 1.0.1
  *
+ * @global object $link
+ *
  * @param string $class
  * @param string $value
  * @param mixed $deprecated Never used.