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<?php $array1 = array('field1' => 'toast', 'field2' => 'butter'); $array2 = array('field1' => 'toast', 'field2' => 'margerine', 'field3' => 'tea'); $keys = array(); print_r(array_diff_key($array1, $array2)); foreach($array2 as $key=>$value) { $t = 0; foreach($array1 as $key2=>$value2) { if($value == $value2) { $t++; } } if($t==0) array_push($keys, $key); } print_r($keys);
Output for 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( ) Array ( [0] => field2 [1] => field3 )
Output for 5.0.0 - 5.0.5
Fatal error: Call to undefined function array_diff_key() in /in/4u63E on line 12
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_diff_key() in /in/4u63E on line 12
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: array_diff_key() in /in/4u63E on line 12
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_diff_key() in /in/4u63E on line 12