3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $regexp = '/(\({0,}\d{2}\){0,})\s{0,}(\d{4,5})\s{0,}-{0,}\s{0,}(\d{4})/'; $matches; preg_match('(11) 4789 2180', $regexp, $matches); print_r($matches);
Output for 5.2.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): Unknown modifier '4' in /in/op0NC on line 6
Output for hhvm-3.10.0 - 3.13.2
Notice: Undefined variable: matches in /in/op0NC on line 4 Warning: Unknown modifier '4': [(11) 4789 2180] in /in/op0NC on line 6
Output for 5.1.0 - 5.1.6
Warning: preg_match(): Unknown modifier '4' in /in/op0NC on line 6 Array ( )
Output for 5.0.4 - 5.0.5
Notice: Undefined variable: matches in /in/op0NC on line 4 Warning: preg_match(): Unknown modifier '4' in /in/op0NC on line 6 Array ( )
Output for 4.3.11 - 5.0.3
Notice: Undefined variable: matches in /in/op0NC on line 4 Warning: preg_match(): Unknown modifier '4' in /in/op0NC on line 6 Array ( )
Output for 4.3.0 - 4.3.10
Notice: Undefined variable: matches in /in/op0NC on line 4 Warning: Unknown modifier '4' in /in/op0NC on line 6 Array ( )