Online PHP editor | refs for cHfqn

<?php abstract class Module { private static $mask = '[[[%s]]]'; public static function work($it) { return preg_replace_callback('~\w+~', 'static::replace', $it); } private static function replace($matches) { return sprintf(static::$mask, $matches[0]); } } abstract class Module2 extends Module { private static $mask = '{{{%s}}}'; } echo Module::work('hello world.'), "\n"; echo Module2::work('hello world.');