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run code in 200+ php & hhvm versions
Bugs & Features
<?php $str = '/2013/06/14/chocolate-peanut-butter-cups/'; $regex = '/\d{4}/\d{2}/\d{2}/[a-z0-9-]'; preg_match($regex, $str, $matches); print_r($matches);
Output for 5.2.0 - 7.1.7
Warning: preg_match(): Unknown modifier '\' in /in/oVWlU on line 4
Output for 4.3.11 - 5.1.6
Warning: preg_match(): Unknown modifier '\' in /in/oVWlU on line 4 Array ( )
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '\' in /in/oVWlU on line 4 Array ( )