3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(0); function f($s){ for($i=0,$n=count($s)-1;$j++<=$n;) if($k=$s[$j]){ $l=$k>0?n:i; ($x=$s[$$l])|($s[$$l]=$k)|($s[$j]=$x); $k>0?$n--|$j--:$i++; } echo print_r($s); } echo "-------------\n"; f( [5, 3, 0, -6, 2, 0, 5] ); echo "\n"; echo "-------------\n";

preferences:
44.76 ms | 402 KiB | 5 Q