3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = 'abcdef'; echo substr($string, 0, strlen($string)-1));
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.29
Parse error: syntax error, unexpected ')', expecting ',' or ';' in /in/78GeP on line 3
Process exited with code 255.
preferences:
189.89 ms | 940 KiB | 67 Q