3v4l.org

run code in 300+ PHP versions simultaneously
<?php function containsIllegalChars($string) { return preg_match(/\W+/, $string); }
Output for 5.3.0 - 5.3.20, 5.4.0 - 5.4.10
Parse error: syntax error, unexpected '/', expecting ')' in /in/CdOvJ on line 4
Process exited with code 255.
preferences:
168.78 ms | 1395 KiB | 39 Q