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run code in 150+ php & hhvm versions
Bugs & Features
<?php $b = preg_replace('/b.*b/', '', 'baab' . str_repeat('a', 100024)); var_dump(ini_get('pcre.backtrack_limit'),ini_get('pcre.recursion_limit'), strlen($b));
Output for 5.3.7 - 7.1.0
string(7) "1000000" string(6) "100000" int(100024)
Output for 5.2.0 - 5.3.6
string(6) "100000" string(6) "100000" int(0)
Output for 4.3.0 - 5.1.6
string(0) "" string(0) "" int(100024)