php get non unique values from array

1
2<?php
3$input = array("a" => "green", "red", "b" => "green", "blue", "red");
4$result = array_unique($input);
5print_r($result);
6?>
7
8Array
9(
10    [a] => green
11    [0] => red
12    [1] => blue
13)

1<?php
2    // Syntax: array_unique(array $array, int $flags = SORT_STRING): array
3    // Desc: Removes duplicate values from an array
4    $arr = Array("red", "red", "green", "blue", "blue", "white");
5    echo "<pre>";
6    print_r($arr);
7    echo "</pre> <br><br>";
8    
9    $arrUnique = array_unique($arr);
10
11    echo "<pre>";
12    print_r($arrUnique);
13    echo "</pre> <br><br>";
14
15    /* -------- output -----------
16    Array
17    (
18        [0] => red
19        [1] => red
20        [2] => green
21        [3] => blue
22        [4] => blue
23        [5] => white
24    )
25    
26    Array
27    (
28        [0] => red
29        [2] => green
30        [3] => blue
31        [5] => white
32    )
33    */
34?>

1is it possible to Beating with shoes you all