array unique multidimensional php

1<?php
2    function super_unique($array,$key)
3    {
4       $temp_array = [];
5       foreach ($array as &$v) {
6           if (!isset($temp_array[$v[$key]]))
7           $temp_array[$v[$key]] =& $v;
8       }
9       $array = array_values($temp_array);
10       return $array;
11
12    }
13
14
15$arr="";
16$arr[0]['id']=0;
17$arr[0]['titel']="ABC";
18$arr[1]['id']=1;
19$arr[1]['titel']="DEF";
20$arr[2]['id']=2;
21$arr[2]['titel']="ABC";
22$arr[3]['id']=3;
23$arr[3]['titel']="XYZ";
24
25echo "<pre>";
26print_r($arr);
27echo "unique*********************<br/>";
28print_r(super_unique($arr,'titel'));
29
30?>
31

1$uniquePids = array_unique(array_map(function ($i) { return $i['pid']; }, $holder));

1Array
2(
3    [0] => Array
4        (
5            [id] => 1
6            [value] => 111
7        )
8 
9    [1] => Array
10        (
11            [id] => 2
12            [value] => 222
13        )
14 
15    [2] => Array
16        (
17            [id] => 3
18            [value] => 333
19        )
20 
21    [3] => Array
22        (
23            [id] => 1
24            [value] => 111
25        )
26 
27)
28