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run code in 200+ php & hhvm versions
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<?php $re = '/(\d)\#/is'; $str = '1#P,8488936,12,1'; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.1.0 - 7.3.0alpha1
array(1) { [0]=> array(2) { [0]=> string(2) "1#" [1]=> string(1) "1" } }