3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "british telecom (uk) limited"; $result = preg_replace_callback('/\([a-z]\)/i', function($matches) { return strtoupper($matches[0]); }, ucwords($string)); var_dump($result);

preferences:
44.18 ms | 402 KiB | 5 Q