3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo date("YW", mktime(0, 0, 0, 01, 08, 2015));
Output for 7.0.0 - 7.0.1
Parse error: Invalid numeric literal in /in/bFqUt on line 3
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
201401
preferences:
195.31 ms | 1395 KiB | 73 Q