3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str='175.160.166.8 - - [15/May/2013:22:07:55 +0800] "GET /downfile/975-2013.05.15-20.00.mp3 HTTP/1.1" 206 622360 "http://fm.jybox.net/" "Mozilla/5.0 (Linux; U; Android 4.0.3; zh-cn; Lenovo P700 Build/IML74K) AppleWebKit/533.1 (KHTML, like Gecko) Mobile Safari/533.1"'; preg_match_all('%\/(.+)\.mp3%', $str, $r); print_r($r);

preferences:
41.16 ms | 402 KiB | 5 Q