filter duplicate associative array by value check in php

1<?php
2$list_programming_language = array('C#',  'C++', 'PHP', 'C#', 'PHP');
3$result = array_unique($list_programming_language);
4print_r($result);
5?>
6  
7// ==> 'C#',  'C++', 'PHP'

1<?php
2function unique_key($array,$keyname){
3
4 $new_array = array();
5 foreach($array as $key=>$value){
6
7   if(!isset($new_array[$value[$keyname]])){
8     $new_array[$value[$keyname]] = $value;
9   }
10
11 }
12 $new_array = array_values($new_array);
13 return $new_array;
14}
15
16// Array
17$student_arr[] = array("name" => "Yogesh Singh","age"=>24);
18$student_arr[] = array("name" => "Sonarika Bhadoria","age"=>24);
19$student_arr[] = array("name" => "Anil Singh","age" => 23);
20$student_arr[] = array("name" => "Mayank Patidar","age" => 25);
21$student_arr[] = array("name" => "Anil Singh","age" => 19);
22
23// Remove duplicate value according to 'name'
24$student_unique_arr = unique_key($student_arr,'name');
25
26echo "<pre>";
27print_r($student_arr);
28echo "</pre>";
29
30echo "<b>Array after remove duplicate key</b>";
31echo "<pre>";
32print_r($student_unique_arr);
33echo "</pre>";