3v4l.org

run code in 300+ PHP versions simultaneously
<?php for($i = 1; $i < 1000; $i++) { $varArray1[] = $i ** ($i * 2); if($i%2==0) $varArray2[] = $i ** ($i * 2); else $varArray2[] = $i ** ($i * 4); } array_diff($varArray1,$varArray2);

preferences:
39.39 ms | 402 KiB | 5 Q