3v4l.org

run code in 300+ PHP versions simultaneously
<?php function canonicalize($address) { $address = explode('/', $address); $keys = array_keys($address, '..'); foreach($keys AS $keypos => $key) { array_splice($address, $key - ($keypos * 2 + 1), 2); } $address = implode('/', $address); $address = str_replace('./', '', $address); return $address; } echo canonicalize("http://www.zakzak.co.jp/entertainment/ent-news/news/20140216//../../../../entertainment/ent-news/images/20140216/enn1402161257010-n1.jpg");
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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
http://www.zakzak.co.jp/entertainment/entertainment/ent-news/images/20140216/enn1402161257010-n1.jpg
preferences:
245.7 ms | 406 KiB | 315 Q