3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); for ($i = 0; $i < ($strLength / 2); $i++) { $substr1 += $string[$strLength-$i]; $substr2 += $string[$i]; } return $string = $substr1 + $substr2; } reverse('12345');
based on c9qvc
Output for 7.1.0
Notice: Uninitialized string offset: 5 in /in/u7FF8 on line 7 Warning: A non-numeric value encountered in /in/u7FF8 on line 7 Warning: A non-numeric value encountered in /in/u7FF8 on line 7 Warning: A non-numeric value encountered in /in/u7FF8 on line 8
Output for 5.2.10 - 5.6.28, 7.0.0 - 7.0.14
Notice: Uninitialized string offset: 5 in /in/u7FF8 on line 7
Output for hhvm-3.10.0 - 3.12.0
Output for 4.3.0 - 5.2.9
Notice: Uninitialized string offset: 5 in /in/u7FF8 on line 7