3v4l.org

run code in 300+ PHP versions simultaneously
<?php $result = []; for ($a=1;$a<=10;$a++){ if ($a % 3 != 0){ $result[] = $a * $a; } } echo implode(",", $result); // 1,4,16,25,49,64,100

preferences:
25.03 ms | 404 KiB | 5 Q