3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = 0; for ($count = 0, $count <= 1000; $count ++) $x = $x * $x; echo $x;
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.30
Parse error: syntax error, unexpected ')', expecting ';' in /in/CJbMi on line 3
Process exited with code 255.
preferences:
191.4 ms | 1395 KiB | 67 Q