删除重复的数组元素

Question

In php i have an array as an example below called $source which contains

array(5) {
    [0] => array(2) {
               ['id'] => string(18)'619025087225999360'
               ['url'] => 'http//example.com/apple'
           }
    [1] => array(2) {
               ['id'] => string(18)'623368621227847680'
               ['url'] => 'http//example.com/orange'
           }
    [2] => array(2) {
               ['id'] => string(18)'623368621227847680'
               ['url'] => 'http//example.com/blackberry'
           }
}

So in the above array you can see index number '1' & '2' have the same 'id'. This could be a huge array with repeated 'id' appearing a few times.

What i wanna do is if there is same id i just wanna pick up the first 'id' and discard the other one. I tried to solve this using array_unique() but could not apply it properly. Can someone please help me out here ??

Answer 1

make new array and copy unique elements from old
$source_new = array(); foreach($source as $v) if (!isset($source_new[$v['id']])) $source_new[$v['id']] = $v; $source = array_values($source_new);