3v4l.org

run code in 150+ 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)-2;$i+=2,$j++){ // echo(" i: ".$i); $arr[$i]=$tmp0; $tmp0 = $arr[$i+1]; // echo(" tmp0: ".$tmp0); $arr[$i+1]=$tmp1; $tmp1 = $arr[$j+1]; //echo(" tmp1: ".$tmp1); printIt($arr); echo("\n"); } echo("\n"); function printIt($arr){ for($i=0;$i<count($arr);$i++){ echo($arr[$i]." "); } } ?>
Output for 4.3.0 - 5.6.25, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1 a 3 4 5 6 7 8 9 10 a b c d e f g h i j 1 a 2 b 5 6 7 8 9 10 a b c d e f g h i j 1 a 2 b 4 c 7 8 9 10 a b c d e f g h i j 1 a 2 b 4 c 6 d 9 10 a b c d e f g h i j 1 a 2 b 4 c 6 d 8 e a b c d e f g h i j 1 a 2 b 4 c 6 d 8 e 10 f c d e f g h i j 1 a 2 b 4 c 6 d 8 e 10 f b g e f g h i j 1 a 2 b 4 c 6 d 8 e 10 f b g d h g h i j 1 a 2 b 4 c 6 d 8 e 10 f b g d h f i i j