php怎么去除数组中相同的键名

$original_array = array(  "id" => "001",  "name" => "John",  "gender" => "male",  "id" => "002",  "city" => "New York",  "gender" => "female");$new_array = array_values(array_unique($original_array));$result_array = array_combine(range(1, count($new_array)), $new_array);print_r($result_array);

Array(    [1] => 001    [2] => John    [3] => male    [4] => New York    [5] => female)

$original_array = array(  "id" => "001",  "name" => "John",  "gender" => "male",  "id" => "002",  "city" => "New York",  "gender" => "female");foreach ($original_array as $key => $value) {  $duplicated_key = array_keys($original_array, $value);  if (count($duplicated_key) > 1) {    unset($original_array[$duplicated_key[0]]);  }}print_r($original_array);

Array(    [name] => John    [gender] => female    [city] => New York)