Remove duplicates from Array based on multiple keys [duplicate]

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); will work for this sample data. — mickmackusa
– mickmackusa ♦, Commented May 20, 2022 at 3:29

AbraCadaver · Accepted Answer · 2016-04-25 12:30:04Z

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, 2016 at 12:30

answered Jul 21, 2015 at 2:24

AbraCadaver

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Comments

Thi Tran · Accepted Answer · 2015-07-21 02:25:30Z

4

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);

answered Jul 21, 2015 at 2:25

Thi Tran

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2 Comments

AbraCadaver Over a year ago

I think you could return false and use array_filter.

Thi Tran Over a year ago

yes, I see, but when I use array_filter I have to explain for @chhorn soro. Btw, your solution is very excellent

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