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
@@@@@@@ Warning: Increment on type bool has no effect, this will change in the next major version of PHP in /in/1SaqH 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 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
@@@@@@@
preferences:
199.26 ms | 406 KiB | 311 Q