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run code in 150+ php & hhvm versions
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<?php function remove_index_etc($url) { echo preg_match('/[\?#]/',$url); if (substr($url, -1) == "*" && preg_match('/[\?#]/',$url)) { $url = preg_replace('/^(.*)(?:\/(?:home|default|index)\..{3,4})([\/|\*]+)?$/i', "$1(?:$|((?:\/(?:home|default|index)\..{3,4})|\/?[\?#]+.*))$2", $url); } else { $url = preg_replace('/^(.*)(?:\/(?:home|default|index)\..{3,4})([\?|\/|#]+.*)*$/i', "$1(?:$|((?:\/(?:home|default|index)\..{3,4})|\/?[\?#]))$2", $url); } return $url; } echo remove_index_etc("http://a.com/index.html") . PHP_EOL; echo remove_index_etc("http://a.com/index.html*"). PHP_EOL; echo remove_index_etc("http://a.com/index.html?a=1"). PHP_EOL; echo remove_index_etc("http://a.com/*"). PHP_EOL; echo remove_index_etc("http://a.com/index.html?a=1*"). PHP_EOL; echo remove_index_etc("http://a.com/index.html#a=1*"). PHP_EOL; echo remove_index_etc("http://a.com#index.html?a=1"). PHP_EOL; echo remove_index_etc("http://a.com#index.html?a=1*"). PHP_EOL;
Output for 4.3.10 - 4.4.9, 5.0.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
0http://a.com(?:$|((?:\/(?:home|default|index)\..{3,4})|\/?[\?#])) 0http://a.com/index.html* 1http://a.com(?:$|((?:\/(?:home|default|index)\..{3,4})|\/?[\?#]))?a=1 0http://a.com/* 1http://a.com/index.html?a=1* 1http://a.com/index.html#a=1* 1http://a.com#index.html?a=1 1http://a.com#index.html?a=1*
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
0http://a.com(?:$|((?:\/(?:home|default|index)\..{3,4})|\/?[\?#]))PHP_EOL0http://a.com/index.html*PHP_EOL1http://a.com(?:$|((?:\/(?:home|default|index)\..{3,4})|\/?[\?#]))?a=1PHP_EOL0http://a.com/*PHP_EOL1http://a.com/index.html?a=1*PHP_EOL1http://a.com/index.html#a=1*PHP_EOL1http://a.com#index.html?a=1PHP_EOL1http://a.com#index.html?a=1*PHP_EOL