3v4l.org

run code in 150+ php & hhvm versions
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<?php $arr = array(1,2,3,4,5,6,7,8,9,10,'a','b','c','d','e','f','g','h','i','j'); $tmp0 = $arr[0]; $tmp1 = $arr[10]; $n=10; for($i=0,$j=$n;$i<count($arr);$i++,$j++){ echo(" i: ".$i); $arr[$i]=$tmp0; $tmp0 = $arr[$i+1]; echo(" tmp0: ".$tmp0); $arr[$i+1]=$tmp1; $tmp1 = $arr[$j+1]; echo(" tmp1: ".$tmp1); echo("\n"); printIt($arr); echo("\n\n"); } echo("\n"); function printIt($arr){ for($i=0;$i<count($arr);$i++){ echo($arr[$i]." "); } } ?>

Abusive script

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