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run code in 150+ php & hhvm versions
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<?php function revert($str) { $a = ''; for($i = 0; $str{$i}; $i++) { $a = $str{$i} . $a; } return $a; } revert('abcdefgh');
Output for 5.2.10 - 5.6.28, 7.0.0 - 7.1.0
Notice: Uninitialized string offset: 8 in /in/2m8EY on line 5
Output for hhvm-3.10.0 - 3.12.0
Output for 4.3.0 - 5.2.9
Notice: Uninitialized string offset: 8 in /in/2m8EY on line 5