3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?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)-1;$i++,$j++){ // echo(" i: ".$i); $arr[$i]=$tmp0; $tmp0 = $arr[$i+1]; $i++; // echo(" tmp0: ".$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]." "); } } ?>
Output for 4.3.0 - 7.2.0
1 2 a 4 5 6 7 8 9 10 a b c d e f g h i j 1 2 2 4 b 6 7 8 9 10 a b c d e f g h i j 1 2 2 4 4 6 c 8 9 10 a b c d e f g h i j 1 2 2 4 4 6 6 8 d 10 a b c d e f g h i j 1 2 2 4 4 6 6 8 8 10 e b c d e f g h i j 1 2 2 4 4 6 6 8 8 10 10 b f d e f g h i j 1 2 2 4 4 6 6 8 8 10 10 b b d g f g h i j 1 2 2 4 4 6 6 8 8 10 10 b b d d f h h i j 1 2 2 4 4 6 6 8 8 10 10 b b d d f f h i j 1 2 2 4 4 6 6 8 8 10 10 b b d d f f h h j j