3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = array( 'Test' => 1, 'OtherKey' => 2, ); $keyTranslation = array( 'OtherKey' => 'other_key', 'Test' => 'test', ); function test(&$arr, $keyTranslation) { foreach ($arr as $key => $value) { $arr["'".$keyTranslation[$key]."'"] = $value; unset($arr[$key]); } } test($arr, $keyTranslation);
based on pHL8D
Output for 7.0.0 - 7.2.0
Output for 5.3.19 - 5.6.28
Notice: Undefined index: 'test' in /in/ZuA2u on line 13 Notice: Undefined index: 'other_key' in /in/ZuA2u on line 13 Notice: Undefined index: '' in /in/ZuA2u on line 13