/**
* Tests which editors are capable of supporting the request.
*
* @since 3.5.0
* @access private
*
* @return string|bool Class name for the first editor that claims to support the request. False if no editor claims to support the request.
*/
private static final function choose_implementation()
{
if (null === self::$implementation) {
$request_order = apply_filters('wp_editors', array('imagick', 'gd'));
// Loop over each editor on each request looking for one which will serve this request's needs
foreach ($request_order as $editor) {
$class = 'WP_Image_Editor_' . $editor;
// Check to see if this editor is a possibility, calls the editor statically
if (!call_user_func(array($class, 'test'))) {
continue;
}
self::$implementation = $class;
break;
}
}
return self::$implementation;
}
