Using WordPress ‘editable_extensions’ PHP filter

The editable_extensions WordPress PHP filter allows you to modify the list of file types allowed for editing in the plugin file editor.

Usage

add_filter('editable_extensions', 'my_custom_editable_extensions', 10, 2);

function my_custom_editable_extensions($default_types, $plugin) {
    // your custom code here
    return $default_types;
}

Parameters

• $default_types (string[]): An array of editable plugin file extensions.
• $plugin (string): Path to the plugin file relative to the plugins directory.

More information

See WordPress Developer Resources: editable_extensions

Examples

Allow .json files to be edited

Enable editing of .json files in the plugin file editor.

add_filter('editable_extensions', 'allow_json_editing', 10, 2);

function allow_json_editing($default_types, $plugin) {
    $default_types[] = 'json';
    return $default_types;
}

Disallow .css files from being edited

Prevent editing of .css files in the plugin file editor.

add_filter('editable_extensions', 'disallow_css_editing', 10, 2);

function disallow_css_editing($default_types, $plugin) {
    $key = array_search('css', $default_types);
    if (false !== $key) {
        unset($default_types[$key]);
    }
    return $default_types;
}

Add a custom file extension for editing

Allow editing of custom .myext files in the plugin file editor.

add_filter('editable_extensions', 'allow_custom_extension_editing', 10, 2);

function allow_custom_extension_editing($default_types, $plugin) {
    $default_types[] = 'myext';
    return $default_types;
}

Filter editable extensions for a specific plugin

Allow editing of .scss files only for a specific plugin in the plugin file editor.

add_filter('editable_extensions', 'allow_scss_for_specific_plugin', 10, 2);

function allow_scss_for_specific_plugin($default_types, $plugin) {
    if ('my-plugin/my-plugin.php' == $plugin) {
        $default_types[] = 'scss';
    }
    return $default_types;
}

Allow only PHP and JS files to be edited

Restrict the plugin file editor to only allow editing of .php and .js files.

add_filter('editable_extensions', 'allow_only_php_js_editing', 10, 2);

function allow_only_php_js_editing($default_types, $plugin) {
    return array('php', 'js');
}