<?php

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/**

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* Filesystem API: Top-level functionality

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*

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* Functions for reading, writing, modifying, and deleting files on the file system.

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* Includes functionality for theme-specific files as well as operations for uploading,

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* archiving, and rendering output when necessary.

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*

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* @package WordPress

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* @subpackage Filesystem

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* @since 2.3.0

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*/

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/** The descriptions for theme files. */

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$wp_file_descriptions = array(

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'functions.php' => __( 'Theme Functions' ),

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'header.php' => __( 'Theme Header' ),

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'footer.php' => __( 'Theme Footer' ),

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'sidebar.php' => __( 'Sidebar' ),

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'comments.php' => __( 'Comments' ),

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'searchform.php' => __( 'Search Form' ),

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'404.php' => __( '404 Template' ),

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'link.php' => __( 'Links Template' ),

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// Archives.

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'index.php' => __( 'Main Index Template' ),

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'archive.php' => __( 'Archives' ),

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'author.php' => __( 'Author Template' ),

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'taxonomy.php' => __( 'Taxonomy Template' ),

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'category.php' => __( 'Category Template' ),

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'tag.php' => __( 'Tag Template' ),

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'home.php' => __( 'Posts Page' ),

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'search.php' => __( 'Search Results' ),

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'date.php' => __( 'Date Template' ),

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// Content.

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'singular.php' => __( 'Singular Template' ),

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'single.php' => __( 'Single Post' ),

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'page.php' => __( 'Single Page' ),

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'front-page.php' => __( 'Homepage' ),

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'privacy-policy.php' => __( 'Privacy Policy Page' ),

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// Attachments.

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'attachment.php' => __( 'Attachment Template' ),

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'image.php' => __( 'Image Attachment Template' ),

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'video.php' => __( 'Video Attachment Template' ),

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'audio.php' => __( 'Audio Attachment Template' ),

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'application.php' => __( 'Application Attachment Template' ),

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// Embeds.

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'embed.php' => __( 'Embed Template' ),

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'embed-404.php' => __( 'Embed 404 Template' ),

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'embed-content.php' => __( 'Embed Content Template' ),

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'header-embed.php' => __( 'Embed Header Template' ),

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'footer-embed.php' => __( 'Embed Footer Template' ),

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// Stylesheets.

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'style.css' => __( 'Stylesheet' ),

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'editor-style.css' => __( 'Visual Editor Stylesheet' ),

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'editor-style-rtl.css' => __( 'Visual Editor RTL Stylesheet' ),

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'rtl.css' => __( 'RTL Stylesheet' ),

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// Other.

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'my-hacks.php' => __( 'my-hacks.php (legacy hacks support)' ),

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'.htaccess' => __( '.htaccess (for rewrite rules )' ),

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// Deprecated files.

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'wp-layout.css' => __( 'Stylesheet' ),

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'wp-comments.php' => __( 'Comments Template' ),

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'wp-comments-popup.php' => __( 'Popup Comments Template' ),

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'comments-popup.php' => __( 'Popup Comments' ),

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);

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/**

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* Gets the description for standard WordPress theme files.

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*

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* @since 1.5.0

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*

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* @global array $wp_file_descriptions Theme file descriptions.

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* @global array $allowed_files List of allowed files.

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*

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* @param string $file Filesystem path or filename.

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* @return string Description of file from $wp_file_descriptions or basename of $file if description doesn't exist.

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* Appends 'Page Template' to basename of $file if the file is a page template.

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*/

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function get_file_description( $file ) {

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global $wp_file_descriptions, $allowed_files;

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$dirname = pathinfo( $file, PATHINFO_DIRNAME );

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$file_path = $allowed_files[ $file ];

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if ( isset( $wp_file_descriptions[ basename( $file ) ] ) && '.' === $dirname ) {

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return $wp_file_descriptions[ basename( $file ) ];

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} elseif ( file_exists( $file_path ) && is_file( $file_path ) ) {

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$template_data = implode( '', file( $file_path ) );

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if ( preg_match( '|Template Name:(.*)$|mi', $template_data, $name ) ) {

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/* translators: %s: Template name. */

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return sprintf( __( '%s Page Template' ), _cleanup_header_comment( $name[1] ) );

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}

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}

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return trim( basename( $file ) );

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}

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/**

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* Gets the absolute filesystem path to the root of the WordPress installation.

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*

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* @since 1.5.0

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*

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* @return string Full filesystem path to the root of the WordPress installation.

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*/

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function get_home_path() {

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$home = set_url_scheme( get_option( 'home' ), 'http' );

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$siteurl = set_url_scheme( get_option( 'siteurl' ), 'http' );

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if ( ! empty( $home ) && 0 !== strcasecmp( $home, $siteurl ) ) {

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$wp_path_rel_to_home = str_ireplace( $home, '', $siteurl ); /* $siteurl - $home */

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$pos = strripos( str_replace( '\\', '/', $_SERVER['SCRIPT_FILENAME'] ), trailingslashit( $wp_path_rel_to_home ) );

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$home_path = substr( $_SERVER['SCRIPT_FILENAME'], 0, $pos );

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$home_path = trailingslashit( $home_path );

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} else {

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$home_path = ABSPATH;

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}

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return str_replace( '\\', '/', $home_path );

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}

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/**

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* Returns a listing of all files in the specified folder and all subdirectories up to 100 levels deep.

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*

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* The depth of the recursiveness can be controlled by the $levels param.

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*

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* @since 2.6.0

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* @since 4.9.0 Added the `$exclusions` parameter.

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*

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* @param string $folder Optional. Full path to folder. Default empty.

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* @param int $levels Optional. Levels of folders to follow, Default 100 (PHP Loop limit).

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* @param string[] $exclusions Optional. List of folders and files to skip.

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* @return string[]|false Array of files on success, false on failure.

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*/

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function list_files( $folder = '', $levels = 100, $exclusions = array() ) {

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if ( empty( $folder ) ) {

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return false;

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}

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$folder = trailingslashit( $folder );

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if ( ! $levels ) {

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return false;

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}

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$files = array();

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$dir = @opendir( $folder );

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if ( $dir ) {

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while ( ( $file = readdir( $dir ) ) !== false ) {

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// Skip current and parent folder links.

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if ( in_array( $file, array( '.', '..' ), true ) ) {

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continue;

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}

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// Skip hidden and excluded files.

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if ( '.' === $file[0] || in_array( $file, $exclusions, true ) ) {

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continue;

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}

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if ( is_dir( $folder . $file ) ) {

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$files2 = list_files( $folder . $file, $levels - 1 );

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if ( $files2 ) {

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$files = array_merge( $files, $files2 );

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} else {

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$files[] = $folder . $file . '/';

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}

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} else {

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$files[] = $folder . $file;

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}

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}

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closedir( $dir );

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}

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return $files;

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}

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/**

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* Gets the list of file extensions that are editable in plugins.

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*

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* @since 4.9.0

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*

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* @param string $plugin Path to the plugin file relative to the plugins directory.

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* @return string[] Array of editable file extensions.

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*/

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function wp_get_plugin_file_editable_extensions( $plugin ) {

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$default_types = array(

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'bash',

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'conf',

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'css',

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'diff',

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'htm',

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'html',

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'http',

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'inc',

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'include',

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'js',

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'json',

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'jsx',

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'less',

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'md',

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'patch',

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'php',

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'php3',

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'php4',

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'php5',

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'php7',

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'phps',

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'phtml',

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'sass',

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'scss',

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'sh',

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'sql',

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'svg',

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'text',

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'txt',

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'xml',

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'yaml',

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'yml',

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);

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/**

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* Filters the list of file types allowed for editing in the plugin editor.

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*

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* @since 2.8.0

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* @since 4.9.0 Added the `$plugin` parameter.

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*

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* @param string[] $default_types An array of editable plugin file extensions.

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* @param string $plugin Path to the plugin file relative to the plugins directory.

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*/

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$file_types = (array) apply_filters( 'editable_extensions', $default_types, $plugin );

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return $file_types;

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}

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/**

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* Gets the list of file extensions that are editable for a given theme.

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*

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* @since 4.9.0

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*

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* @param WP_Theme $theme Theme object.

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* @return string[] Array of editable file extensions.

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*/

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function wp_get_theme_file_editable_extensions( $theme ) {

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$default_types = array(

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'bash',

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'conf',

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'css',

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'diff',

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'htm',

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'html',

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'http',

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'inc',

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'include',

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'js',

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'json',

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'jsx',

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'less',

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'md',

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'patch',

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'php',

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'php3',

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'php4',

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'php5',

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'php7',

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'phps',

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'phtml',

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'sass',

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'scss',

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'sh',

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'sql',

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'svg',

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'text',

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'txt',

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'xml',

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'yaml',

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'yml',

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);

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/**

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* Filters the list of file types allowed for editing in the theme editor.

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*

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* @since 4.4.0

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*

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* @param string[] $default_types An array of editable theme file extensions.

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* @param WP_Theme $theme The current theme object.

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*/

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$file_types = apply_filters( 'wp_theme_editor_filetypes', $default_types, $theme );

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// Ensure that default types are still there.

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return array_unique( array_merge( $file_types, $default_types ) );

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}

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/**

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* Prints file editor templates (for plugins and themes).

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*

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* @since 4.9.0

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*/

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function wp_print_file_editor_templates() {

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?>

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<script type="text/html" id="tmpl-wp-file-editor-notice">

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<div class="notice inline notice-{{ data.type || 'info' }} {{ data.alt ? 'notice-alt' : '' }} {{ data.dismissible ? 'is-dismissible' : '' }} {{ data.classes || '' }}">

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<# if ( 'php_error' === data.code ) { #>

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<p>

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<?php

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printf(

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/* translators: 1: Line number, 2: File path. */

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__( 'Your PHP code changes were rolled back due to an error on line %1$s of file %2$s. Please fix and try saving again.' ),

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'{{ data.line }}',

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'{{ data.file }}'

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);

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?>

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</p>

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<pre>{{ data.message }}</pre>

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<# } else if ( 'file_not_writable' === data.code ) { #>

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<p>

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<?php

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printf(

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/* translators: %s: Documentation URL. */

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__( 'You need to make this file writable before you can save your changes. See <a href="%s">Changing File Permissions</a> for more information.' ),

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__( 'https://wordpress.org/support/article/changing-file-permissions/' )

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);

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?>

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</p>

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<# } else { #>

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<p>{{ data.message || data.code }}</p>

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<# if ( 'lint_errors' === data.code ) { #>

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<p>

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<# var elementId = 'el-' + String( Math.random() ); #>

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<input id="{{ elementId }}" type="checkbox">

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<label for="{{ elementId }}"><?php _e( 'Update anyway, even though it might break your site?' ); ?></label>

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</p>

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<# } #>

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<# } #>

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<# if ( data.dismissible ) { #>

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<button type="button" class="notice-dismiss"><span class="screen-reader-text"><?php _e( 'Dismiss' ); ?></span></button>

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<# } #>

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</div>

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</script>

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<?php

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}

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/**

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* Attempts to edit a file for a theme or plugin.

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*

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* When editing a PHP file, loopback requests will be made to the admin and the homepage

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* to attempt to see if there is a fatal error introduced. If so, the PHP change will be

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* reverted.

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*

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* @since 4.9.0

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*

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* @param string[] $args {

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* Args. Note that all of the arg values are already unslashed. They are, however,

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* coming straight from `$_POST` and are not validated or sanitized in any way.

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*

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* @type string $file Relative path to file.

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* @type string $plugin Path to the plugin file relative to the plugins directory.

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* @type string $theme Theme being edited.

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* @type string $newcontent New content for the file.

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* @type string $nonce Nonce.

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* }

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* @return true|WP_Error True on success or `WP_Error` on failure.

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*/

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function wp_edit_theme_plugin_file( $args ) {

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if ( empty( $args['file'] ) ) {

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return new WP_Error( 'missing_file' );

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}

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$file = $args['file'];

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if ( 0 !== validate_file( $file ) ) {

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return new WP_Error( 'bad_file' );

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}

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if ( ! isset( $args['newcontent'] ) ) {

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return new WP_Error( 'missing_content' );

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}

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$content = $args['newcontent'];

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if ( ! isset( $args['nonce'] ) ) {

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return new WP_Error( 'missing_nonce' );

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}

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$plugin = null;

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$theme = null;

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$real_file = null;

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if ( ! empty( $args['plugin'] ) ) {

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$plugin = $args['plugin'];

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if ( ! current_user_can( 'edit_plugins' ) ) {

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return new WP_Error( 'unauthorized', __( 'Sorry, you are not allowed to edit plugins for this site.' ) );

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}

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if ( ! wp_verify_nonce( $args['nonce'], 'edit-plugin_' . $file ) ) {

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return new WP_Error( 'nonce_failure' );

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}

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if ( ! array_key_exists( $plugin, get_plugins() ) ) {

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return new WP_Error( 'invalid_plugin' );

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}

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if ( 0 !== validate_file( $file, get_plugin_files( $plugin ) ) ) {

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return new WP_Error( 'bad_plugin_file_path', __( 'Sorry, that file cannot be edited.' ) );

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}

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$editable_extensions = wp_get_plugin_file_editable_extensions( $plugin );

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$real_file = WP_PLUGIN_DIR . '/' . $file;

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$is_active = in_array(

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$plugin,

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(array) get_option( 'active_plugins', array() ),

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true

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);

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} elseif ( ! empty( $args['theme'] ) ) {

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$stylesheet = $args['theme'];

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if ( 0 !== validate_file( $stylesheet ) ) {

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return new WP_Error( 'bad_theme_path' );

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}

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if ( ! current_user_can( 'edit_themes' ) ) {

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return new WP_Error( 'unauthorized', __( 'Sorry, you are not allowed to edit templates for this site.' ) );

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}

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$theme = wp_get_theme( $stylesheet );

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if ( ! $theme->exists() ) {

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return new WP_Error( 'non_existent_theme', __( 'The requested theme does not exist.' ) );

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}

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if ( ! wp_verify_nonce( $args['nonce'], 'edit-theme_' . $stylesheet . '_' . $file ) ) {

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return new WP_Error( 'nonce_failure' );

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}

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if ( $theme->errors() && 'theme_no_stylesheet' === $theme->errors()->get_error_code() ) {

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return new WP_Error(

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'theme_no_stylesheet',

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__( 'The requested theme does not exist.' ) . ' ' . $theme->errors()->get_error_message()

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);

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}

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$editable_extensions = wp_get_theme_file_editable_extensions( $theme );

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$allowed_files = array();

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foreach ( $editable_extensions as $type ) {

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switch ( $type ) {

[447] Fix | Delete

case 'php':

[448] Fix | Delete

$allowed_files = array_merge( $allowed_files, $theme->get_files( 'php', -1 ) );

[449] Fix | Delete

break;

[450] Fix | Delete

case 'css':

[451] Fix | Delete

$style_files = $theme->get_files( 'css', -1 );

[452] Fix | Delete

$allowed_files['style.css'] = $style_files['style.css'];

[453] Fix | Delete

$allowed_files = array_merge( $allowed_files, $style_files );

[454] Fix | Delete

break;

[455] Fix | Delete

default:

[456] Fix | Delete

$allowed_files = array_merge( $allowed_files, $theme->get_files( $type, -1 ) );

[457] Fix | Delete

break;

[458] Fix | Delete

}

[459] Fix | Delete

}

[460] Fix | Delete

[461] Fix | Delete

// Compare based on relative paths.

[462] Fix | Delete

if ( 0 !== validate_file( $file, array_keys( $allowed_files ) ) ) {

[463] Fix | Delete

return new WP_Error( 'disallowed_theme_file', __( 'Sorry, that file cannot be edited.' ) );

[464] Fix | Delete

}

[465] Fix | Delete

[466] Fix | Delete

$real_file = $theme->get_stylesheet_directory() . '/' . $file;

[467] Fix | Delete

[468] Fix | Delete

$is_active = ( get_stylesheet() === $stylesheet || get_template() === $stylesheet );

[469] Fix | Delete

[470] Fix | Delete

} else {

[471] Fix | Delete

return new WP_Error( 'missing_theme_or_plugin' );

[472] Fix | Delete

}

[473] Fix | Delete

[474] Fix | Delete

// Ensure file is real.

[475] Fix | Delete

if ( ! is_file( $real_file ) ) {

[476] Fix | Delete

return new WP_Error( 'file_does_not_exist', __( 'File does not exist! Please double check the name and try again.' ) );

[477] Fix | Delete

}

[478] Fix | Delete

[479] Fix | Delete

// Ensure file extension is allowed.

[480] Fix | Delete

$extension = null;

[481] Fix | Delete

if ( preg_match( '/\.([^.]+)$/', $real_file, $matches ) ) {

[482] Fix | Delete

$extension = strtolower( $matches[1] );

[483] Fix | Delete

if ( ! in_array( $extension, $editable_extensions, true ) ) {

[484] Fix | Delete

return new WP_Error( 'illegal_file_type', __( 'Files of this type are not editable.' ) );

[485] Fix | Delete

}

[486] Fix | Delete

}

[487] Fix | Delete

[488] Fix | Delete

$previous_content = file_get_contents( $real_file );

[489] Fix | Delete

[490] Fix | Delete

if ( ! is_writable( $real_file ) ) {

[491] Fix | Delete

return new WP_Error( 'file_not_writable' );

[492] Fix | Delete

}

[493] Fix | Delete

[494] Fix | Delete

$f = fopen( $real_file, 'w+' );

[495] Fix | Delete

if ( false === $f ) {

[496] Fix | Delete

return new WP_Error( 'file_not_writable' );

[497] Fix | Delete

}

[498] Fix | Delete

[499] Fix | Delete