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run code in 150+ php & hhvm versions
Bugs & Features
<?php $range = "2008-2013"; $year = "2008"; $shite = "-2013"; $regex = "(\d{4}\-\d{4}|\d{4})/is"; $matches = array(); preg_match($regex, $range, $matches); preg_match($regex, $year, $matches); preg_match($regex, $shite, $matches); print_r($matches); ?>
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): Unknown modifier '/' in /in/dAaUc on line 10 Warning: preg_match(): Unknown modifier '/' in /in/dAaUc on line 11 Warning: preg_match(): Unknown modifier '/' in /in/dAaUc on line 12 Array ( )
Output for hhvm-3.10.0 - 3.12.0
Warning: Unknown modifier '/': [(\d{4}\-\d{4}|\d{4})/is] in /in/dAaUc on line 10 Warning: Unknown modifier '/': [(\d{4}\-\d{4}|\d{4})/is] in /in/dAaUc on line 11 Warning: Unknown modifier '/': [(\d{4}\-\d{4}|\d{4})/is] in /in/dAaUc on line 12 Array ( )
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '/' in /in/dAaUc on line 10 Warning: Unknown modifier '/' in /in/dAaUc on line 11 Warning: Unknown modifier '/' in /in/dAaUc on line 12 Array ( )