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'); $n=10; $tmp0 = $arr[0]; $tmp1 = $arr[$n]; for($i=0,$j=$n;$i<19;$i++,$j++){ printIt($arr); echo("\n"); $arr[$i]=$tmp0; $tmp0=$arr[$i]; $i++; $arr[$i]=$tmp1; $tmp1=$arr[$j+1]; } printIt($arr); function printIt($arr){ for($i=0;$i<count($arr);$i++){ echo($arr[$i]." "); } } ?>
Output for 5.3.0 - 7.1.0
1 2 3 4 5 6 7 8 9 10 a b c d e f g h i j 1 a 3 4 5 6 7 8 9 10 a b c d e f g h i j 1 a 1 b 5 6 7 8 9 10 a b c d e f g h i j 1 a 1 b 1 c 7 8 9 10 a b c d e f g h i j 1 a 1 b 1 c 1 d 9 10 a b c d e f g h i j 1 a 1 b 1 c 1 d 1 e a b c d e f g h i j 1 a 1 b 1 c 1 d 1 e 1 f c d e f g h i j 1 a 1 b 1 c 1 d 1 e 1 f 1 g e f g h i j 1 a 1 b 1 c 1 d 1 e 1 f 1 g 1 h g h i j 1 a 1 b 1 c 1 d 1 e 1 f 1 g 1 h 1 i i j Notice: Undefined offset: 20 in /in/SYRiJ on line 16 1 a 1 b 1 c 1 d 1 e 1 f 1 g 1 h 1 i 1 j
Output for 4.3.0 - 5.2.17
1 2 3 4 5 6 7 8 9 10 a b c d e f g h i j 1 a 3 4 5 6 7 8 9 10 a b c d e f g h i j 1 a 1 b 5 6 7 8 9 10 a b c d e f g h i j 1 a 1 b 1 c 7 8 9 10 a b c d e f g h i j 1 a 1 b 1 c 1 d 9 10 a b c d e f g h i j 1 a 1 b 1 c 1 d 1 e a b c d e f g h i j 1 a 1 b 1 c 1 d 1 e 1 f c d e f g h i j 1 a 1 b 1 c 1 d 1 e 1 f 1 g e f g h i j 1 a 1 b 1 c 1 d 1 e 1 f 1 g 1 h g h i j 1 a 1 b 1 c 1 d 1 e 1 f 1 g 1 h 1 i i j Notice: Undefined offset: 20 in /in/SYRiJ on line 16 1 a 1 b 1 c 1 d 1 e 1 f 1 g 1 h 1 i 1 j