Ian Ian - 6 months ago 9
PHP Question

How to remove duplicate values from a multi-dimensional array in PHP

How can I remove duplicate values from a multi-dimensional array in PHP?

Example array:

Array
(
[0] => Array
(
[0] => abc
[1] => def
)

[1] => Array
(
[0] => ghi
[1] => jkl
)

[2] => Array
(
[0] => mno
[1] => pql
)

[3] => Array
(
[0] => abc
[1] => def
)

[4] => Array
(
[0] => ghi
[1] => jkl
)

[5] => Array
(
[0] => mno
[1] => pql
)

)

Answer

Here is another way. No intermediate variables are saved.

We used this to de-duplicate results from a variety of overlapping queries.

$input = array_map("unserialize", array_unique(array_map("serialize", $input)));
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