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run code in 150+ php & hhvm versions
Bugs & Features
<?php $range = "2008-2013"; $year = "2008"; $shite = "-2013"; $regex = "/^(\d{0,4}+(?:-\d{0,4}+)?)$/is"; $matches = array(array()); preg_match($regex, $range, $matches[$$range]); preg_match($regex, $year, $matches[1]); preg_match($regex, $shite, $matches[2]); print_r($matches); ?>
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
Notice: Undefined variable: 2008-2013 in /in/R7Fh6 on line 10 Array ( [0] => Array ( ) [] => Array ( [0] => 2008-2013 [1] => 2008-2013 ) [1] => Array ( [0] => 2008 [1] => 2008 ) [2] => Array ( [0] => -2013 [1] => -2013 ) )
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: 2008-2013 in /in/R7Fh6 on line 10 Array ( [0] => Array ( ) [] => Array ( [0] => 2008-2013 [1] => 2008-2013 ) [1] => Array ( [0] => 2008 [1] => 2008 ) [2] => Array ( [0] => -2013 [1] => -2013 ) )