how to remove duplicate values from an array in php

1<?php
2$fruits_list = array('Orange',  'Apple', ' Banana', 'Cherry', ' Banana');
3$result = array_unique($fruits_list);
4print_r($result);
5?>
6  
7Output:
8
9Array ( [0] => Orange [1] => Apple [2] => Banana [3] => Cherry ) 

1<?php
2$input = array("a" => "green", "red", "b" => "green", "blue", "red");
3$result = array_unique($input);
4print_r($result);
5?>
6
7Array
8(
9    [a] => green
10    [0] => red
11    [1] => blue
12)

1$str = implode(',',array_unique(explode(',', $str)));