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<?php function array_pluck($key, $input) { if (is_array($key) || !is_array($input)) return array(); $array = array(); foreach($input as $v) { if(array_key_exists($key, $v)) $array[]=$v[$key]; } return $array; } $testArray = array(1, 'test' => array('a' => array('percy', 'mitch'), 'b', 'c')); $res = array_pluck('a', $testArray); var_dump($res);
Output for 5.3.0 - 7.1.0
Warning: array_key_exists() expects parameter 2 to be array, integer given in /in/bYaQ8 on line 7 array(1) { [0]=> array(2) { [0]=> string(5) "percy" [1]=> string(5) "mitch" } }
Output for 4.3.2 - 5.2.17
Warning: array_key_exists(): The second argument should be either an array or an object in /in/bYaQ8 on line 7 array(1) { [0]=> array(2) { [0]=> string(5) "percy" [1]=> string(5) "mitch" } }
Output for 4.3.0 - 4.3.1
Warning: array_key_exists() [http://www.php.net/function.array-key-exists]: The second argument should be either an array or an object in /in/bYaQ8 on line 7 array(1) { [0]=> array(2) { [0]=> string(5) "percy" [1]=> string(5) "mitch" } }