3v4l.org

run code in 300+ PHP versions simultaneously
<?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)-2;$i+=2,$j++){ // echo(" i: ".$i); $arr[$i]=$tmp0; $tmp0 = $arr[$i+2]; // echo(" tmp0: ".$tmp0); $arr[$i+1]=$tmp1; $tmp1 = $arr[$j+1]; //echo(" tmp1: ".$tmp1); printIt($arr); echo("\n"); } echo("\n"); function printIt($arr){ for($i=0;$i<count($arr);$i++){ echo($arr[$i]." "); } } ?>
Output for git.master, git.master_jit, rfc.property-hooks
1 a 3 4 5 6 7 8 9 10 a b c d e f g h i j 1 a 3 b 5 6 7 8 9 10 a b c d e f g h i j 1 a 3 b 5 c 7 8 9 10 a b c d e f g h i j 1 a 3 b 5 c 7 d 9 10 a b c d e f g h i j 1 a 3 b 5 c 7 d 9 e a b c d e f g h i j 1 a 3 b 5 c 7 d 9 e a f c d e f g h i j 1 a 3 b 5 c 7 d 9 e a f c g e f g h i j 1 a 3 b 5 c 7 d 9 e a f c g e h g h i j 1 a 3 b 5 c 7 d 9 e a f c g e h g i i j

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