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run code in 150+ php & hhvm versions
Bugs & Features
<?php $code = "$1?1?2/:1$2?3?4?5/:2$3E/:3$8?1?2/:4$5$7E/:5$6$7E/:1$7E/:2$4/"; preg_match_all('~\$\K\d+~', $code, $matches); print_r($matches[0]);
Output for 4.4.9, 5.2.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 8 [4] => 5 [5] => 7 [6] => 6 [7] => 7 [8] => 7 [9] => 4 )
Output for 4.3.0 - 4.4.8, 5.0.0 - 5.2.3
Array ( )