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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; $i++; $tmp0=$arr[$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 - 5.6.28, 7.0.0 - 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 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 Notice: Undefined offset: 20 in /in/CZ0sO on line 15 1 a 2 b 4 c 6 d 8 e 10 f b g d h f i h j
Output for hhvm-3.12.0
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 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 Notice: Undefined index: 20 in /in/CZ0sO on line 15 1 a 2 b 4 c 6 d 8 e 10 f b g d h f i h j
Output for hhvm-3.10.0
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 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 Notice: Undefined index: 20 in /in/CZ0sO on line -1 1 a 2 b 4 c 6 d 8 e 10 f b g d h f i h 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 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 Notice: Undefined offset: 20 in /in/CZ0sO on line 15 1 a 2 b 4 c 6 d 8 e 10 f b g d h f i h j