Online PHP editor | refs for O7EKD

<?php class Foo { function escape($str) { return '`' . $str . '`'; } function bar() { $str = 'hello world !'; $cb = array($this, 'escape'); return preg_replace_callback('~\w+~', function($m) use ($cb) { return call_user_func($cb, $m[0]); }, $str); } } $foo = new Foo(); echo $foo->bar();