3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = '+358 40 867 1180'; if(preg_match('', $str, $match)) { if(strlen($match[0]) === strlen($str)) { echo 'kyllä'; } else { echo 'ei'; } } else { echo 'eivv'; }
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): Empty regular expression in /in/4t6VX on line 4 eivv
Output for 4.3.0 - 4.3.10, hhvm-3.10.0 - 3.12.0
Warning: Empty regular expression in /in/4t6VX on line 4 eivv