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<?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); print$r[1][0];
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => Array ( [0] => /975-2013.05.15-20.00.mp3 ) [1] => Array ( [0] => 975-2013.05.15-20.00 ) ) 975-2013.05.15-20.00

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205.66 ms | 406 KiB | 369 Q