WordPress 4.5

[autoinstalls/wordpress.git] / wp-admin / includes / misc.php

diff --git a/wp-admin/includes/misc.php b/wp-admin/includes/misc.php
index 5b609e45ba1f39dbedd82a37ae3a83ac545448f1..64cc521544231dc887e187b029a01dfb1fa64edc 100644 (file)
--- a/wp-admin/includes/misc.php
+++ b/wp-admin/includes/misc.php
@@ -7,24 +7,61 @@
  */
 
 /**
  */
 
 /**

- * {@internal Missing Short Description}}
+ * Returns whether the server is running Apache with the mod_rewrite module loaded.

  *
  * @since 2.0.0
  *
  *
  * @since 2.0.0
  *

- * @return unknown
+ * @return bool

  */
 function got_mod_rewrite() {
        $got_rewrite = apache_mod_loaded('mod_rewrite', true);
  */
 function got_mod_rewrite() {
        $got_rewrite = apache_mod_loaded('mod_rewrite', true);

-       return apply_filters('got_rewrite', $got_rewrite);
+
+       /**
+        * Filter whether Apache and mod_rewrite are present.
+        *
+        * This filter was previously used to force URL rewriting for other servers,
+        * like nginx. Use the got_url_rewrite filter in got_url_rewrite() instead.
+        *
+        * @since 2.5.0
+        *
+        * @see got_url_rewrite()
+        *
+        * @param bool $got_rewrite Whether Apache and mod_rewrite are present.
+        */
+       return apply_filters( 'got_rewrite', $got_rewrite );
+}
+
+/**
+ * Returns whether the server supports URL rewriting.
+ *
+ * Detects Apache's mod_rewrite, IIS 7.0+ permalink support, and nginx.
+ *
+ * @since 3.7.0
+ *
+ * @global bool $is_nginx
+ *
+ * @return bool Whether the server supports URL rewriting.
+ */
+function got_url_rewrite() {
+       $got_url_rewrite = ( got_mod_rewrite() || $GLOBALS['is_nginx'] || iis7_supports_permalinks() );
+
+       /**
+        * Filter whether URL rewriting is available.
+        *
+        * @since 3.7.0
+        *
+        * @param bool $got_url_rewrite Whether URL rewriting is available.
+        */
+       return apply_filters( 'got_url_rewrite', $got_url_rewrite );

 }
 
 /**
 }
 
 /**

- * {@internal Missing Short Description}}
+ * Extracts strings from between the BEGIN and END markers in the .htaccess file.

  *
  * @since 1.5.0
  *
  *
  * @since 1.5.0
  *

- * @param unknown_type $filename
- * @param unknown_type $marker
+ * @param string $filename
+ * @param string $marker

  * @return array An array of strings from a file (.htaccess ) from between BEGIN and END markers.
  */
 function extract_from_markers( $filename, $marker ) {
  * @return array An array of strings from a file (.htaccess ) from between BEGIN and END markers.
  */
 function extract_from_markers( $filename, $marker ) {


@@ -51,64 +88,99 @@ function extract_from_markers( $filename, $marker ) {
 }
 
 /**
 }
 
 /**

- * {@internal Missing Short Description}}
- *

  * Inserts an array of strings into a file (.htaccess ), placing it between
  * Inserts an array of strings into a file (.htaccess ), placing it between

- * BEGIN and END markers. Replaces existing marked info. Retains surrounding
+ * BEGIN and END markers.
+ *
+ * Replaces existing marked info. Retains surrounding

  * data. Creates file if none exists.
  *
  * @since 1.5.0
  *
  * data. Creates file if none exists.
  *
  * @since 1.5.0
  *

- * @param unknown_type $filename
- * @param unknown_type $marker
- * @param unknown_type $insertion
+ * @param string       $filename  Filename to alter.
+ * @param string       $marker    The marker to alter.
+ * @param array|string $insertion The new content to insert.

  * @return bool True on write success, false on failure.
  */
 function insert_with_markers( $filename, $marker, $insertion ) {
  * @return bool True on write success, false on failure.
  */
 function insert_with_markers( $filename, $marker, $insertion ) {

-       if (!file_exists( $filename ) || is_writeable( $filename ) ) {
-               if (!file_exists( $filename ) ) {
-                       $markerdata = '';
-               } else {
-                       $markerdata = explode( "\n", implode( '', file( $filename ) ) );
+       if ( ! file_exists( $filename ) ) {
+               if ( ! is_writable( dirname( $filename ) ) ) {
+                       return false;

                }
                }

-
-               if ( !$f = @fopen( $filename, 'w' ) )
+               if ( ! touch( $filename ) ) {

                        return false;
                        return false;

+               }
+       } elseif ( ! is_writeable( $filename ) ) {
+               return false;
+       }

 
 

-               $foundit = false;
-               if ( $markerdata ) {
-                       $state = true;
-                       foreach ( $markerdata as $n => $markerline ) {
-                               if (strpos($markerline, '# BEGIN ' . $marker) !== false)
-                                       $state = false;
-                               if ( $state ) {
-                                       if ( $n + 1 < count( $markerdata ) )
-                                               fwrite( $f, "{$markerline}\n" );
-                                       else
-                                               fwrite( $f, "{$markerline}" );
-                               }
-                               if (strpos($markerline, '# END ' . $marker) !== false) {
-                                       fwrite( $f, "# BEGIN {$marker}\n" );
-                                       if ( is_array( $insertion ))
-                                               foreach ( $insertion as $insertline )
-                                                       fwrite( $f, "{$insertline}\n" );
-                                       fwrite( $f, "# END {$marker}\n" );
-                                       $state = true;
-                                       $foundit = true;
-                               }
-                       }
+       if ( ! is_array( $insertion ) ) {
+               $insertion = explode( "\n", $insertion );
+       }
+
+       $start_marker = "# BEGIN {$marker}";
+       $end_marker   = "# END {$marker}";
+
+       $fp = fopen( $filename, 'r+' );
+       if ( ! $fp ) {
+               return false;
+       }
+
+       // Attempt to get a lock. If the filesystem supports locking, this will block until the lock is acquired.
+       flock( $fp, LOCK_EX );
+
+       $lines = array();
+       while ( ! feof( $fp ) ) {
+               $lines[] = rtrim( fgets( $fp ), "\r\n" );
+       }
+
+       // Split out the existing file into the preceeding lines, and those that appear after the marker
+       $pre_lines = $post_lines = $existing_lines = array();
+       $found_marker = $found_end_marker = false;
+       foreach ( $lines as $line ) {
+               if ( ! $found_marker && false !== strpos( $line, $start_marker ) ) {
+                       $found_marker = true;
+                       continue;
+               } elseif ( ! $found_end_marker && false !== strpos( $line, $end_marker ) ) {
+                       $found_end_marker = true;
+                       continue;

                }
                }

-               if (!$foundit) {
-                       fwrite( $f, "\n# BEGIN {$marker}\n" );
-                       foreach ( $insertion as $insertline )
-                               fwrite( $f, "{$insertline}\n" );
-                       fwrite( $f, "# END {$marker}\n" );
+               if ( ! $found_marker ) {
+                       $pre_lines[] = $line;
+               } elseif ( $found_marker && $found_end_marker ) {
+                       $post_lines[] = $line;
+               } else {
+                       $existing_lines[] = $line;

                }
                }

-               fclose( $f );
+       }
+
+       // Check to see if there was a change
+       if ( $existing_lines === $insertion ) {
+               flock( $fp, LOCK_UN );
+               fclose( $fp );
+

                return true;
                return true;

-       } else {
-               return false;

        }
        }

+
+       // Generate the new file data
+       $new_file_data = implode( "\n", array_merge(
+               $pre_lines,
+               array( $start_marker ),
+               $insertion,
+               array( $end_marker ),
+               $post_lines
+       ) );
+
+       // Write to the start of the file, and truncate it to that length
+       fseek( $fp, 0 );
+       $bytes = fwrite( $fp, $new_file_data );
+       if ( $bytes ) {
+               ftruncate( $fp, ftell( $fp ) );
+       }
+       fflush( $fp );
+       flock( $fp, LOCK_UN );
+       fclose( $fp );
+
+       return (bool) $bytes;

 }
 
 /**
 }
 
 /**


@@ -118,6 +190,8 @@ function insert_with_markers( $filename, $marker, $insertion ) {
  * blank out old rules.
  *
  * @since 1.5.0
  * blank out old rules.
  *
  * @since 1.5.0

+ *
+ * @global WP_Rewrite $wp_rewrite

  */
 function save_mod_rewrite_rules() {
        if ( is_multisite() )
  */
 function save_mod_rewrite_rules() {
        if ( is_multisite() )


@@ -128,8 +202,10 @@ function save_mod_rewrite_rules() {
        $home_path = get_home_path();
        $htaccess_file = $home_path.'.htaccess';
 
        $home_path = get_home_path();
        $htaccess_file = $home_path.'.htaccess';
 

-       // If the file doesn't already exist check for write access to the directory and whether we have some rules.
-       // else check for write access to the file.
+       /*
+        * If the file doesn't already exist check for write access to the directory
+        * and whether we have some rules. Else check for write access to the file.
+        */

        if ((!file_exists($htaccess_file) && is_writable($home_path) && $wp_rewrite->using_mod_rewrite_permalinks()) || is_writable($htaccess_file)) {
                if ( got_mod_rewrite() ) {
                        $rules = explode( "\n", $wp_rewrite->mod_rewrite_rules() );
        if ((!file_exists($htaccess_file) && is_writable($home_path) && $wp_rewrite->using_mod_rewrite_permalinks()) || is_writable($htaccess_file)) {
                if ( got_mod_rewrite() ) {
                        $rules = explode( "\n", $wp_rewrite->mod_rewrite_rules() );


@@ -146,6 +222,8 @@ function save_mod_rewrite_rules() {
  *
  * @since 2.8.0
  *
  *
  * @since 2.8.0
  *

+ * @global WP_Rewrite $wp_rewrite
+ *

  * @return bool True if web.config was updated successfully
  */
 function iis7_save_url_rewrite_rules(){
  * @return bool True if web.config was updated successfully
  */
 function iis7_save_url_rewrite_rules(){


@@ -170,11 +248,11 @@ function iis7_save_url_rewrite_rules(){
 }
 
 /**
 }
 
 /**

- * {@internal Missing Short Description}}
+ * Update the "recently-edited" file for the plugin or theme editor.

  *
  * @since 1.5.0
  *
  *
  * @since 1.5.0
  *

- * @param unknown_type $file
+ * @param string $file

  */
 function update_recently_edited( $file ) {
        $oldfiles = (array ) get_option( 'recently_edited' );
  */
 function update_recently_edited( $file ) {
        $oldfiles = (array ) get_option( 'recently_edited' );


@@ -192,7 +270,7 @@ function update_recently_edited( $file ) {
 }
 
 /**
 }
 
 /**

- * If siteurl, home or page_on_front changed, flush rewrite rules.
+ * Flushes rewrite rules if siteurl, home or page_on_front changed.

  *
  * @since 2.1.0
  *
  *
  * @since 2.1.0
  *


@@ -200,32 +278,16 @@ function update_recently_edited( $file ) {
  * @param string $value
  */
 function update_home_siteurl( $old_value, $value ) {
  * @param string $value
  */
 function update_home_siteurl( $old_value, $value ) {

-       if ( defined( "WP_INSTALLING" ) )
+       if ( wp_installing() )

                return;
 
                return;
 

-       // If home changed, write rewrite rules to new location.
-       flush_rewrite_rules();
+       if ( is_multisite() && ms_is_switched() ) {
+               delete_option( 'rewrite_rules' );
+       } else {
+               flush_rewrite_rules();
+       }

 }
 
 }
 

-add_action( 'update_option_home', 'update_home_siteurl', 10, 2 );
-add_action( 'update_option_siteurl', 'update_home_siteurl', 10, 2 );
-add_action( 'update_option_page_on_front', 'update_home_siteurl', 10, 2 );
-
-/**
- * Shorten an URL, to be used as link text
- *
- * @since 1.2.1
- *
- * @param string $url
- * @return string
- */
-function url_shorten( $url ) {
-       $short_url = str_replace( array( 'http://', 'www.' ), '', $url );
-       $short_url = untrailingslashit( $short_url );
-       if ( strlen( $short_url ) > 35 )
-               $short_url = substr( $short_url, 0, 32 ) . '&hellip;';
-       return $short_url;
-}

 
 /**
  * Resets global variables based on $_GET and $_POST
 
 /**
  * Resets global variables based on $_GET and $_POST


@@ -239,31 +301,29 @@ function url_shorten( $url ) {
  * @param array $vars An array of globals to reset.
  */
 function wp_reset_vars( $vars ) {
  * @param array $vars An array of globals to reset.
  */
 function wp_reset_vars( $vars ) {

-       for ( $i=0; $i<count( $vars ); $i += 1 ) {
-               $var = $vars[$i];
-               global $$var;
-
-               if ( empty( $_POST[$var] ) ) {
-                       if ( empty( $_GET[$var] ) )
-                               $$var = '';
-                       else
-                               $$var = $_GET[$var];
+       foreach ( $vars as $var ) {
+               if ( empty( $_POST[ $var ] ) ) {
+                       if ( empty( $_GET[ $var ] ) ) {
+                               $GLOBALS[ $var ] = '';
+                       } else {
+                               $GLOBALS[ $var ] = $_GET[ $var ];
+                       }

                } else {
                } else {

-                       $$var = $_POST[$var];
+                       $GLOBALS[ $var ] = $_POST[ $var ];

                }
        }
 }
 
 /**
                }
        }
 }
 
 /**

- * {@internal Missing Short Description}}
+ * Displays the given administration message.

  *
  * @since 2.1.0
  *
  *
  * @since 2.1.0
  *

- * @param unknown_type $message
+ * @param string|WP_Error $message

  */
 function show_message($message) {
        if ( is_wp_error($message) ){
  */
 function show_message($message) {
        if ( is_wp_error($message) ){

-               if ( $message->get_error_data() )
+               if ( $message->get_error_data() && is_string( $message->get_error_data() ) )

                        $message = $message->get_error_message() . ': ' . $message->get_error_data();
                else
                        $message = $message->get_error_message();
                        $message = $message->get_error_message() . ': ' . $message->get_error_data();
                else
                        $message = $message->get_error_message();


@@ -273,6 +333,12 @@ function show_message($message) {
        flush();
 }
 
        flush();
 }
 

+/**
+ * @since 2.8.0
+ *
+ * @param string $content
+ * @return array
+ */

 function wp_doc_link_parse( $content ) {
        if ( !is_string( $content ) || empty( $content ) )
                return array();
 function wp_doc_link_parse( $content ) {
        if ( !is_string( $content ) || empty( $content ) )
                return array();


@@ -281,11 +347,15 @@ function wp_doc_link_parse( $content ) {
                return array();
 
        $tokens = token_get_all( $content );
                return array();
 
        $tokens = token_get_all( $content );

+       $count = count( $tokens );

        $functions = array();
        $ignore_functions = array();
        $functions = array();
        $ignore_functions = array();

-       for ( $t = 0, $count = count( $tokens ); $t < $count; $t++ ) {
-               if ( !is_array( $tokens[$t] ) ) continue;
-               if ( T_STRING == $tokens[$t][0] && ( '(' == $tokens[ $t + 1 ] || '(' == $tokens[ $t + 2 ] ) ) {
+       for ( $t = 0; $t < $count - 2; $t++ ) {
+               if ( ! is_array( $tokens[ $t ] ) ) {
+                       continue;
+               }
+
+               if ( T_STRING == $tokens[ $t ][0] && ( '(' == $tokens[ $t + 1 ] || '(' == $tokens[ $t + 2 ] ) ) {

                        // If it's a function or class defined locally, there's not going to be any docs available
                        if ( ( isset( $tokens[ $t - 2 ][1] ) && in_array( $tokens[ $t - 2 ][1], array( 'function', 'class' ) ) ) || ( isset( $tokens[ $t - 2 ][0] ) && T_OBJECT_OPERATOR == $tokens[ $t - 1 ][0] ) ) {
                                $ignore_functions[] = $tokens[$t][1];
                        // If it's a function or class defined locally, there's not going to be any docs available
                        if ( ( isset( $tokens[ $t - 2 ][1] ) && in_array( $tokens[ $t - 2 ][1], array( 'function', 'class' ) ) ) || ( isset( $tokens[ $t - 2 ][0] ) && T_OBJECT_OPERATOR == $tokens[ $t - 1 ][0] ) ) {
                                $ignore_functions[] = $tokens[$t][1];


@@ -297,7 +367,16 @@ function wp_doc_link_parse( $content ) {
 
        $functions = array_unique( $functions );
        sort( $functions );
 
        $functions = array_unique( $functions );
        sort( $functions );

+
+       /**
+        * Filter the list of functions and classes to be ignored from the documentation lookup.
+        *
+        * @since 2.8.0
+        *
+        * @param array $ignore_functions Functions and classes to be ignored.
+        */

        $ignore_functions = apply_filters( 'documentation_ignore_functions', $ignore_functions );
        $ignore_functions = apply_filters( 'documentation_ignore_functions', $ignore_functions );

+

        $ignore_functions = array_unique( $ignore_functions );
 
        $out = array();
        $ignore_functions = array_unique( $ignore_functions );
 
        $out = array();


@@ -313,8 +392,8 @@ function wp_doc_link_parse( $content ) {
 /**
  * Saves option for number of rows when listing posts, pages, comments, etc.
  *
 /**
  * Saves option for number of rows when listing posts, pages, comments, etc.
  *

- * @since 2.8
-**/
+ * @since 2.8.0
+ */

 function set_screen_options() {
 
        if ( isset($_POST['wp_screen_options']) && is_array($_POST['wp_screen_options']) ) {
 function set_screen_options() {
 
        if ( isset($_POST['wp_screen_options']) && is_array($_POST['wp_screen_options']) ) {


@@ -357,14 +436,38 @@ function set_screen_options() {
                                        return;
                                break;
                        default:
                                        return;
                                break;
                        default:

-                               $value = apply_filters('set-screen-option', false, $option, $value);
+
+                               /**
+                                * Filter a screen option value before it is set.
+                                *
+                                * The filter can also be used to modify non-standard [items]_per_page
+                                * settings. See the parent function for a full list of standard options.
+                                *
+                                * Returning false to the filter will skip saving the current option.
+                                *
+                                * @since 2.8.0
+                                *
+                                * @see set_screen_options()
+                                *
+                                * @param bool|int $value  Screen option value. Default false to skip.
+                                * @param string   $option The option name.
+                                * @param int      $value  The number of rows to use.
+                                */
+                               $value = apply_filters( 'set-screen-option', false, $option, $value );
+

                                if ( false === $value )
                                        return;
                                break;
                }
 
                update_user_meta($user->ID, $option, $value);
                                if ( false === $value )
                                        return;
                                break;
                }
 
                update_user_meta($user->ID, $option, $value);

-               wp_safe_redirect( remove_query_arg( array('pagenum', 'apage', 'paged'), wp_get_referer() ) );
+
+               $url = remove_query_arg( array( 'pagenum', 'apage', 'paged' ), wp_get_referer() );
+               if ( isset( $_POST['mode'] ) ) {
+                       $url = add_query_arg( array( 'mode' => $_POST['mode'] ), $url );
+               }
+
+               wp_safe_redirect( $url );

                exit;
        }
 }
                exit;
        }
 }


@@ -380,8 +483,9 @@ function set_screen_options() {
 function iis7_rewrite_rule_exists($filename) {
        if ( ! file_exists($filename) )
                return false;
 function iis7_rewrite_rule_exists($filename) {
        if ( ! file_exists($filename) )
                return false;

-       if ( ! class_exists('DOMDocument') )
+       if ( ! class_exists( 'DOMDocument', false ) ) {

                return false;
                return false;

+       }

 
        $doc = new DOMDocument();
        if ( $doc->load($filename) === false )
 
        $doc = new DOMDocument();
        if ( $doc->load($filename) === false )


@@ -407,8 +511,9 @@ function iis7_delete_rewrite_rule($filename) {
        if ( ! file_exists($filename) )
                return true;
 
        if ( ! file_exists($filename) )
                return true;
 

-       if ( ! class_exists('DOMDocument') )
+       if ( ! class_exists( 'DOMDocument', false ) ) {

                return false;
                return false;

+       }

 
        $doc = new DOMDocument();
        $doc->preserveWhiteSpace = false;
 
        $doc = new DOMDocument();
        $doc->preserveWhiteSpace = false;


@@ -437,8 +542,9 @@ function iis7_delete_rewrite_rule($filename) {
  * @return bool
  */
 function iis7_add_rewrite_rule($filename, $rewrite_rule) {
  * @return bool
  */
 function iis7_add_rewrite_rule($filename, $rewrite_rule) {

-       if ( ! class_exists('DOMDocument') )
+       if ( ! class_exists( 'DOMDocument', false ) ) {

                return false;
                return false;

+       }

 
        // If configuration file does not exist then we create one.
        if ( ! file_exists($filename) ) {
 
        // If configuration file does not exist then we create one.
        if ( ! file_exists($filename) ) {


@@ -527,31 +633,92 @@ function saveDomDocument($doc, $filename) {
  * Display the default admin color scheme picker (Used in user-edit.php)
  *
  * @since 3.0.0
  * Display the default admin color scheme picker (Used in user-edit.php)
  *
  * @since 3.0.0

+ *
+ * @global array $_wp_admin_css_colors
+ *
+ * @param int $user_id User ID.

  */
  */

-function admin_color_scheme_picker() {
-       global $_wp_admin_css_colors, $user_id; ?>
-<fieldset><legend class="screen-reader-text"><span><?php _e('Admin Color Scheme')?></span></legend>
-<?php
-$current_color = get_user_option('admin_color', $user_id);
-if ( empty($current_color) )
-       $current_color = 'fresh';
-foreach ( $_wp_admin_css_colors as $color => $color_info ): ?>
-<div class="color-option"><input name="admin_color" id="admin_color_<?php echo esc_attr( $color ); ?>" type="radio" value="<?php echo esc_attr( $color ); ?>" class="tog" <?php checked($color, $current_color); ?> />
-       <table class="color-palette">
-       <tr>
-       <?php foreach ( $color_info->colors as $html_color ): ?>
-       <td style="background-color: <?php echo esc_attr( $html_color ); ?>" title="<?php echo esc_attr( $color ); ?>">&nbsp;</td>
-       <?php endforeach; ?>
-       </tr>
-       </table>
-
-       <label for="admin_color_<?php echo esc_attr( $color ); ?>"><?php echo esc_html( $color_info->name ); ?></label>
-</div>
-       <?php endforeach; ?>
-</fieldset>
-<?php
+function admin_color_scheme_picker( $user_id ) {
+       global $_wp_admin_css_colors;
+
+       ksort( $_wp_admin_css_colors );
+
+       if ( isset( $_wp_admin_css_colors['fresh'] ) ) {
+               // Set Default ('fresh') and Light should go first.
+               $_wp_admin_css_colors = array_filter( array_merge( array( 'fresh' => '', 'light' => '' ), $_wp_admin_css_colors ) );
+       }
+
+       $current_color = get_user_option( 'admin_color', $user_id );
+
+       if ( empty( $current_color ) || ! isset( $_wp_admin_css_colors[ $current_color ] ) ) {
+               $current_color = 'fresh';
+       }
+
+       ?>
+       <fieldset id="color-picker" class="scheme-list">
+               <legend class="screen-reader-text"><span><?php _e( 'Admin Color Scheme' ); ?></span></legend>
+               <?php
+               wp_nonce_field( 'save-color-scheme', 'color-nonce', false );
+               foreach ( $_wp_admin_css_colors as $color => $color_info ) :
+
+                       ?>
+                       <div class="color-option <?php echo ( $color == $current_color ) ? 'selected' : ''; ?>">
+                               <input name="admin_color" id="admin_color_<?php echo esc_attr( $color ); ?>" type="radio" value="<?php echo esc_attr( $color ); ?>" class="tog" <?php checked( $color, $current_color ); ?> />
+                               <input type="hidden" class="css_url" value="<?php echo esc_url( $color_info->url ); ?>" />
+                               <input type="hidden" class="icon_colors" value="<?php echo esc_attr( wp_json_encode( array( 'icons' => $color_info->icon_colors ) ) ); ?>" />
+                               <label for="admin_color_<?php echo esc_attr( $color ); ?>"><?php echo esc_html( $color_info->name ); ?></label>
+                               <table class="color-palette">
+                                       <tr>
+                                       <?php
+
+                                       foreach ( $color_info->colors as $html_color ) {
+                                               ?>
+                                               <td style="background-color: <?php echo esc_attr( $html_color ); ?>">&nbsp;</td>
+                                               <?php
+                                       }
+
+                                       ?>
+                                       </tr>
+                               </table>
+                       </div>
+                       <?php
+
+               endforeach;
+
+       ?>
+       </fieldset>
+       <?php

 }
 
 }
 

+/**
+ *
+ * @global array $_wp_admin_css_colors
+ */
+function wp_color_scheme_settings() {
+       global $_wp_admin_css_colors;
+
+       $color_scheme = get_user_option( 'admin_color' );
+
+       // It's possible to have a color scheme set that is no longer registered.
+       if ( empty( $_wp_admin_css_colors[ $color_scheme ] ) ) {
+               $color_scheme = 'fresh';
+       }
+
+       if ( ! empty( $_wp_admin_css_colors[ $color_scheme ]->icon_colors ) ) {
+               $icon_colors = $_wp_admin_css_colors[ $color_scheme ]->icon_colors;
+       } elseif ( ! empty( $_wp_admin_css_colors['fresh']->icon_colors ) ) {
+               $icon_colors = $_wp_admin_css_colors['fresh']->icon_colors;
+       } else {
+               // Fall back to the default set of icon colors if the default scheme is missing.
+               $icon_colors = array( 'base' => '#82878c', 'focus' => '#00a0d2', 'current' => '#fff' );
+       }
+
+       echo '<script type="text/javascript">var _wpColorScheme = ' . wp_json_encode( array( 'icons' => $icon_colors ) ) . ";</script>\n";
+}
+
+/**
+ * @since 3.3.0
+ */

 function _ipad_meta() {
        if ( wp_is_mobile() ) {
                ?>
 function _ipad_meta() {
        if ( wp_is_mobile() ) {
                ?>


@@ -559,12 +726,16 @@ function _ipad_meta() {
                <?php
        }
 }
                <?php
        }
 }

-add_action('admin_head', '_ipad_meta');

 
 /**
  * Check lock status for posts displayed on the Posts screen
  *
 
 /**
  * Check lock status for posts displayed on the Posts screen
  *

- * @since 3.6
+ * @since 3.6.0
+ *
+ * @param array  $response  The Heartbeat response.
+ * @param array  $data      The $_POST data sent.
+ * @param string $screen_id The screen id.
+ * @return array The Heartbeat response.

  */
 function wp_check_locked_posts( $response, $data, $screen_id ) {
        $checked = array();
  */
 function wp_check_locked_posts( $response, $data, $screen_id ) {
        $checked = array();


@@ -590,12 +761,16 @@ function wp_check_locked_posts( $response, $data, $screen_id ) {
 
        return $response;
 }
 
        return $response;
 }

-add_filter( 'heartbeat_received', 'wp_check_locked_posts', 10, 3 );

 
 /**
  * Check lock status on the New/Edit Post screen and refresh the lock
  *
 
 /**
  * Check lock status on the New/Edit Post screen and refresh the lock
  *

- * @since 3.6
+ * @since 3.6.0
+ *
+ * @param array  $response  The Heartbeat response.
+ * @param array  $data      The $_POST data sent.
+ * @param string $screen_id The screen id.
+ * @return array The Heartbeat response.

  */
 function wp_refresh_post_lock( $response, $data, $screen_id ) {
        if ( array_key_exists( 'wp-refresh-post-lock', $data ) ) {
  */
 function wp_refresh_post_lock( $response, $data, $screen_id ) {
        if ( array_key_exists( 'wp-refresh-post-lock', $data ) ) {


@@ -629,39 +804,135 @@ function wp_refresh_post_lock( $response, $data, $screen_id ) {
 
        return $response;
 }
 
        return $response;
 }

-add_filter( 'heartbeat_received', 'wp_refresh_post_lock', 10, 3 );

 
 /**
  * Check nonce expiration on the New/Edit Post screen and refresh if needed
  *
 
 /**
  * Check nonce expiration on the New/Edit Post screen and refresh if needed
  *

- * @since 3.6
+ * @since 3.6.0
+ *
+ * @param array  $response  The Heartbeat response.
+ * @param array  $data      The $_POST data sent.
+ * @param string $screen_id The screen id.
+ * @return array The Heartbeat response.

  */
 function wp_refresh_post_nonces( $response, $data, $screen_id ) {
        if ( array_key_exists( 'wp-refresh-post-nonces', $data ) ) {
                $received = $data['wp-refresh-post-nonces'];
                $response['wp-refresh-post-nonces'] = array( 'check' => 1 );
 
  */
 function wp_refresh_post_nonces( $response, $data, $screen_id ) {
        if ( array_key_exists( 'wp-refresh-post-nonces', $data ) ) {
                $received = $data['wp-refresh-post-nonces'];
                $response['wp-refresh-post-nonces'] = array( 'check' => 1 );
 

-               if ( ! $post_id = absint( $received['post_id'] ) )
+               if ( ! $post_id = absint( $received['post_id'] ) ) {

                        return $response;
                        return $response;

+               }

 
 

-               if ( ! current_user_can( 'edit_post', $post_id ) || empty( $received['post_nonce'] ) )
+               if ( ! current_user_can( 'edit_post', $post_id ) ) {

                        return $response;
                        return $response;

+               }

 
 

-               if ( 2 === wp_verify_nonce( $received['post_nonce'], 'update-post_' . $post_id ) ) {
-                       $response['wp-refresh-post-nonces'] = array(
-                               'replace' => array(
-                                       'autosavenonce' => wp_create_nonce('autosave'),
-                                       'getpermalinknonce' => wp_create_nonce('getpermalink'),
-                                       'samplepermalinknonce' => wp_create_nonce('samplepermalink'),
-                                       'closedpostboxesnonce' => wp_create_nonce('closedpostboxes'),
-                                       '_ajax_linking_nonce' => wp_create_nonce( 'internal-linking' ),
-                                       '_wpnonce' => wp_create_nonce( 'update-post_' . $post_id ),
-                               ),
-                               'heartbeatNonce' => wp_create_nonce( 'heartbeat-nonce' ),
-                       );
+               $response['wp-refresh-post-nonces'] = array(
+                       'replace' => array(
+                               'getpermalinknonce' => wp_create_nonce('getpermalink'),
+                               'samplepermalinknonce' => wp_create_nonce('samplepermalink'),
+                               'closedpostboxesnonce' => wp_create_nonce('closedpostboxes'),
+                               '_ajax_linking_nonce' => wp_create_nonce( 'internal-linking' ),
+                               '_wpnonce' => wp_create_nonce( 'update-post_' . $post_id ),
+                       ),
+                       'heartbeatNonce' => wp_create_nonce( 'heartbeat-nonce' ),
+               );
+       }
+
+       return $response;
+}
+
+/**
+ * Disable suspension of Heartbeat on the Add/Edit Post screens.
+ *
+ * @since 3.8.0
+ *
+ * @global string $pagenow
+ *
+ * @param array $settings An array of Heartbeat settings.
+ * @return array Filtered Heartbeat settings.
+ */
+function wp_heartbeat_set_suspension( $settings ) {
+       global $pagenow;
+
+       if ( 'post.php' === $pagenow || 'post-new.php' === $pagenow ) {
+               $settings['suspension'] = 'disable';
+       }
+
+       return $settings;
+}
+
+/**
+ * Autosave with heartbeat
+ *
+ * @since 3.9.0
+ *
+ * @param array $response The Heartbeat response.
+ * @param array $data     The $_POST data sent.
+ * @return array The Heartbeat response.
+ */
+function heartbeat_autosave( $response, $data ) {
+       if ( ! empty( $data['wp_autosave'] ) ) {
+               $saved = wp_autosave( $data['wp_autosave'] );
+
+               if ( is_wp_error( $saved ) ) {
+                       $response['wp_autosave'] = array( 'success' => false, 'message' => $saved->get_error_message() );
+               } elseif ( empty( $saved ) ) {
+                       $response['wp_autosave'] = array( 'success' => false, 'message' => __( 'Error while saving.' ) );
+               } else {
+                       /* translators: draft saved date format, see http://php.net/date */
+                       $draft_saved_date_format = __( 'g:i:s a' );
+                       /* translators: %s: date and time */
+                       $response['wp_autosave'] = array( 'success' => true, 'message' => sprintf( __( 'Draft saved at %s.' ), date_i18n( $draft_saved_date_format ) ) );

                }
        }
 
        return $response;
 }
                }
        }
 
        return $response;
 }

-add_filter( 'heartbeat_received', 'wp_refresh_post_nonces', 10, 3 );
+
+/**
+ * Disables autocomplete on the 'post' form (Add/Edit Post screens) for WebKit browsers,
+ * as they disregard the autocomplete setting on the editor textarea. That can break the editor
+ * when the user navigates to it with the browser's Back button. See #28037
+ *
+ * @since 4.0.0
+ *
+ * @global bool $is_safari
+ * @global bool $is_chrome
+ */
+function post_form_autocomplete_off() {
+       global $is_safari, $is_chrome;
+
+       if ( $is_safari || $is_chrome ) {
+               echo ' autocomplete="off"';
+       }
+}
+
+/**
+ * Remove single-use URL parameters and create canonical link based on new URL.
+ *
+ * Remove specific query string parameters from a URL, create the canonical link,
+ * put it in the admin header, and change the current URL to match.
+ *
+ * @since 4.2.0
+ */
+function wp_admin_canonical_url() {
+       $removable_query_args = wp_removable_query_args();
+
+       if ( empty( $removable_query_args ) ) {
+               return;
+       }
+
+       // Ensure we're using an absolute URL.
+       $current_url  = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
+       $filtered_url = remove_query_arg( $removable_query_args, $current_url );
+       ?>
+       <link id="wp-admin-canonical" rel="canonical" href="<?php echo esc_url( $filtered_url ); ?>" />
+       <script>
+               if ( window.history.replaceState ) {
+                       window.history.replaceState( null, null, document.getElementById( 'wp-admin-canonical' ).href + window.location.hash );
+               }
+       </script>
+<?php
+}