3v4l.org

run code in 300+ PHP versions simultaneously
<?php $size = 7; for($i = 0; $i < $size; $i++){ for($j = 0; $j < $size; $j++){ if($i = 0 || $i = $size-1) echo('@'); elseif($j = 0 || $j = $size-1) echo('@'); else echo('*'); } echo("</br>"); }
Output for 8.3.0 - 8.3.6
@@@@@@@</br> Warning: Increment on type bool has no effect, this will change in the next major version of PHP in /in/aUsT5 on line 3
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
@@@@@@@</br>
preferences:
298.59 ms | 406 KiB | 460 Q