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'); $n=10; $tmp0 = $arr[0]; $tmp1 = $arr[$n]; for($i=0,$j=$n;$i<17;$i++,$j++){ $arr[$i]=$tmp0; $tmp0=$arr[$i+1]; $arr[$i+1]=$arr[$j]; } printIt($arr); function printIt($arr){ for($i=0;$i<count($arr);$i++){ echo($arr[$i]." "); } } ?>
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key 20 in /in/1o8H3 on line 11 Warning: Undefined array key 21 in /in/1o8H3 on line 11 Warning: Undefined array key 22 in /in/1o8H3 on line 11 Warning: Undefined array key 23 in /in/1o8H3 on line 11 Warning: Undefined array key 24 in /in/1o8H3 on line 11 Warning: Undefined array key 25 in /in/1o8H3 on line 11 Warning: Undefined array key 26 in /in/1o8H3 on line 11 1 2 3 4 5 6 7 8 9 10 a b c d e f g i j

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