Online PHP editor | refs for o63Ys

<?php $actualArray = array( user1 => array( 'name' => 'User1', 'age' => '25', 'lastLogin' => '2013-08-16' ), user1 => array( 'name' => 'User1', 'age' => '25', 'lastLogin' => '2013-08-10' ), user2 => array( 'name' => 'User2', 'age' => '35', 'lastLogin' => '2013-08-08' ), user1 => array( 'name' => 'User1', 'age' => '25', 'lastLogin' => '2013-07-10' ) ); function uniqueAssocArray($array, $uniqueKey) { if (!is_array($array)) { return array(); } $uniqueKeys = array(); foreach ($array as $key => $item) { if (!in_array($item[$uniqueKey], $uniqueKeys)) { $uniqueKeys[$item[$uniqueKey]] = $item; } } return $uniqueKeys; } var_dump(uniqueAssocArray($actualArray, 'name'));