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up vote 1 down vote favorite

I have an array like this 

Array
(
    [0] => Array
        (
            [id] => BA
            [name] => British Airways
        )

    [1] => Array
        (
            [id] => BA
            [name] => British Airways
        )

    [2] => Array
        (
            [id] => LA
            [name] => Lanchile
        )

    [3] => Array
        (
            [id] => LA
            [name] => Lanchile
        )

    [4] => Array
        (
            [id] => BA
            [name] => British Airways
        )

    [5] => Array
        (
            [id] => BA
            [name] => British Airways
        )

)

and i want to get

Array
(
    [0] => Array
        (
            [id] => BA
            [name] => British Airways
        )

    [1] => Array
        (
            [id] => LA
            [name] => Lanchile
        )
)

but after using array_unique function, all i have is 

Array
(
    [0] => Array
        (
            [id] => BA
            [name] => British Airways
        )

)

what am i doing wrong?

share|improve this question
2  
Did you try using array_unique(my_array, SORT_REGULAR) ? –  diegoperini May 3 '13 at 11:25
1  
Possible duplicate - stackoverflow.com/q/307674/608170. Also if this array is the result of a query, you need to recheck your query so as to eliminate the duplicates. –  verisimilitude May 3 '13 at 11:26
1  
possible duplicate of stackoverflow.com/questions/6766942/… –  ling.s May 3 '13 at 11:27
    
Dont know how to mark comment as an answer, but 'diegoperini' you right, array_unique(my_array, SORT_REGULAR) + sort() solved the problem! :) –  Nerfair May 3 '13 at 13:09
    
Wish I saw these comments 1 hour earlier. I don't think you can mark comments as an answer. You should answer the question yourself, give @diegoperini credit and mark the answer as completed. –  Niklas Ekman Jul 29 '13 at 14:43
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4 Answers

up vote 6 down vote accepted 
array_unique(my_array, SORT_REGULAR)

As requested in comments. :)

share|improve this answer
    
Very nice solution, worked for me like a charm :) –  vanemaster Oct 29 '13 at 16:01
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up vote 2 down vote

As mentioned array_unique doesn't support multi dimensional arrays, but you could iterate over the data and build your own

<?php
$airlines = array(
    array('id' => 'BA', 'name' => 'British Airways'),
    array('id' => 'LA', 'name' => 'Lanchile'),
    array('id' => 'BA', 'name' => 'British Airways'),
    array('id' => 'LA', 'name' => 'Lanchile'),
    array('id' => 'BA', 'name' => 'British Airways'),
    array('id' => 'LA', 'name' => 'Lanchile'),
);
$tmp = array();
foreach ($airlines as $item) {
    if (!in_array($item['id'], $tmp)) {
        $unique[] = $item;
        $tmp[] = $item['id'];
    }
}

var_dump($unique); // $unqiue will have your desired results in it var_dump was just for testing
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up vote 1 down vote 
$airlines = array(
    array('id' => 'BA', 'name' => 'British Airways'),
    array('id' => 'LA', 'name' => 'Lanchile'),
    array('id' => 'BA', 'name' => 'British Airways'),
    array('id' => 'LA', 'name' => 'Lanchile'),
    array('id' => 'BA', 'name' => 'British Airways'),
    array('id' => 'LA', 'name' => 'Lanchile'),
);


$unique = array_map(
    'unserialize',
    array_unique(
        array_map(
            'serialize',
            $airlines
        )
    )
);

var_dump($unique);
share|improve this answer
    
That would fail if the order of the elements are different. array_unique($airlines, SORT_REGULAR); is the correct answer. –  cleong May 3 '13 at 11:45
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up vote 1 down vote 
 array_unique is not intended to work on multi dimensional arrays.

You need to loop the array

array_unique

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