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 => $value) { var_dump($arr); var_dump($keyTranslation[$key]); $arr[$keyTranslation[$key]] = $value; unset($arr[$key]); } } test($arr, $keyTranslation);
based on nThDZ
Output for 7.0.0 - 7.2.0
array(2) { ["Test"]=> int(1) ["OtherKey"]=> int(2) } string(4) "test" array(2) { ["OtherKey"]=> int(2) ["test"]=> int(1) } string(9) "other_key"
Output for 5.3.19 - 5.6.28
array(2) { ["Test"]=> int(1) ["OtherKey"]=> int(2) } string(4) "test" array(2) { ["OtherKey"]=> int(2) ["test"]=> int(1) } string(9) "other_key" array(2) { ["test"]=> int(1) ["other_key"]=> int(2) } Notice: Undefined index: test in /in/QFYrA on line 14 NULL Notice: Undefined index: test in /in/QFYrA on line 16 array(2) { ["other_key"]=> int(2) [""]=> int(1) } Notice: Undefined index: other_key in /in/QFYrA on line 14 NULL Notice: Undefined index: other_key in /in/QFYrA on line 16 array(1) { [""]=> int(2) } Notice: Undefined index: in /in/QFYrA on line 14 NULL Notice: Undefined index: in /in/QFYrA on line 16