3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); $b = array(); $c = array(); for ($x=1,$n=0;$x<20;$x=$x+3) { $a[] = $x; $b[] = $x+1; $c[] = $x+2; //$x = $x+3; } print_r($a); echo "\n\n"; print_r($b); echo "\n\n"; print_r($c); echo "\n\n";

preferences:
38.68 ms | 402 KiB | 5 Q