Remove duplicates from Array based on multiple keys

Question

I have an array structure like the following:

Array
(
    [0] => Array
        (
            [title] => Blue
            [image] => catalog/Color/blue.png
        )
    [1] => Array
        (
            [title] => Black
            [image] => catalog/Color/black.png
        )
    [2] => Array
        (
            [title] => Black
            [image] => catalog/Color/black.png
        )
)

What I want to do is to remove duplicate element from array. I have tried to use array_unique($myarray), but it seem not working.

In addition to the dupe, [array_unique($array, SORT_REGULAR);](https://stackoverflow.com/a/18373723/2943403) will work for this sample data. — mickmackusa, May 20 '22 at 03:29

AbraCadaver · Answer 1 · 2016-04-25T12:30:04.487

6

Just use the title and image combined as the keys and it will insure uniqueness:

foreach($array as $val) {
    $result[$val['title'].$val['image']] = $val;
}
// if you want, get values and reindex
$result = array_values($result);

edited Apr 25 '16 at 12:30

answered Jul 21 '15 at 02:24

AbraCadaver

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score 4 · Accepted Answer · answered Jul 21 '15 at 02:25

Try my solution:

<?php
function searchDuplicate($arr, $obj) {
    foreach ($arr as $value) {
        if ($value['title'] == $obj['title'] && $value['image'] == $obj['image']) {
            return true; //duplicate
        }
    }
    return false;
};

$arr = array(
    array (
            'title' => 'Blue',
            'image' => 'catalog/Color/blue.png'
        ),
    array (
            'title' => 'Black',
            'image' => 'catalog/Color/black.png'
        ),
     array (
            'title' => 'Black',
            'image' => 'catalog/Color/black.png'
        )
);

$result = array();
foreach ($arr as $obj) {
    if (searchDuplicate($result, $obj) === false) {
        $result[] = $obj;
    }
}

print_r($result);

yes, I see, but when I use array_filter I have to explain for @chhorn soro. Btw, your solution is very excellent — Thi Tran, Jul 21 '15 at 02:33

Remove duplicates from Array based on multiple keys

2 Answers2