Returns true if it’s an Ajax request.

$action string|null Optional

Whether the supplied Ajax action is being run.

Default: null

bool True if it's an Ajax request, false otherwise.

File: wp-includes/class-wp-customize-manager.php. View all references

public function doing_ajax( $action = null ) {
	if ( ! wp_doing_ajax() ) {
		return false;
	}

	if ( ! $action ) {
		return true;
	} else {
		/*
		 * Note: we can't just use doing_action( "wp_ajax_{$action}" ) because we need
		 * to check before admin-ajax.php gets to that point.
		 */
		return isset( $_REQUEST['action'] ) && wp_unslash( $_REQUEST['action'] ) === $action;
	}
}