Title: wp_get_theme_file_editable_extensions
Published: November 20, 2017
Last modified: August 20, 2026

---

# wp_get_theme_file_editable_extensions( WP_Theme $theme ): string[]

## In this article

 * [Parameters](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#source)
 * [Hooks](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#hooks)
 * [Related](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#wp--skip-link--target)

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

## 󠀁[Parameters](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#parameters)󠁿

 `$theme`[WP_Theme](https://developer.wordpress.org/reference/classes/wp_theme/)
required

Theme object.

## 󠀁[Return](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#return)󠁿

 string[] Array of editable file extensions.

## 󠀁[Source](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#source)󠁿

    ```php
    function wp_get_theme_file_editable_extensions( $theme ) {

    	$default_types = array(
    		'bash',
    		'conf',
    		'css',
    		'diff',
    		'htm',
    		'html',
    		'http',
    		'inc',
    		'include',
    		'js',
    		'mjs',
    		'json',
    		'jsx',
    		'less',
    		'md',
    		'patch',
    		'php',
    		'php3',
    		'php4',
    		'php5',
    		'php7',
    		'phps',
    		'phtml',
    		'sass',
    		'scss',
    		'sh',
    		'sql',
    		'svg',
    		'text',
    		'txt',
    		'xml',
    		'yaml',
    		'yml',
    	);

    	/**
    	 * Filters the list of file types allowed for editing in the theme file editor.
    	 *
    	 * @since 4.4.0
    	 *
    	 * @param string[] $default_types An array of editable theme file extensions.
    	 * @param WP_Theme $theme         The active theme object.
    	 */
    	$file_types = apply_filters( 'wp_theme_editor_filetypes', $default_types, $theme );

    	// Ensure that default types are still there.
    	return array_unique( array_merge( $file_types, $default_types ) );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-admin/includes/file.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-admin/includes/file.php#L252)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-admin/includes/file.php#L252-L302)

## 󠀁[Hooks](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#hooks)󠁿

 [apply_filters( ‘wp_theme_editor_filetypes’, string[] $default_types, WP_Theme $theme )](https://developer.wordpress.org/reference/hooks/wp_theme_editor_filetypes/)

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

## 󠀁[Related](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#related)󠁿

| Uses | Description | 
| [apply_filters()](https://developer.wordpress.org/reference/functions/apply_filters/)`wp-includes/plugin.php` |

Calls the callback functions that have been added to a filter hook.

  |

| Used by | Description | 
| [wp_edit_theme_plugin_file()](https://developer.wordpress.org/reference/functions/wp_edit_theme_plugin_file/)`wp-admin/includes/file.php` |

Attempts to edit a file for a theme or plugin.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/functions/wp_get_theme_file_editable_extensions/?output_format=md#changelog)󠁿

| Version | Description | 
| [4.9.0](https://developer.wordpress.org/reference/since/4.9.0/) | Introduced. |

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