Question

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

Answer 1

$array = [
    ["abc", "def"],
    ["ghi", "jkl"],
    ["mno", "pqr"],
    ["abc", "def"],
    ["ghi", "jkl"],
    ["mno", "pqr"]
];
 
$array = array_unique($array, SORT_REGULAR);
 
print_r($array);
 
 
 
/*
run:
 
Array
(
    [0] => Array
        (
            [0] => abc
            [1] => def
        )
 
    [1] => Array
        (
            [0] => ghi
            [1] => jkl
        )
 
    [2] => Array
        (
            [0] => mno
            [1] => pqr
        )
 
)
 
*/

 

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Answer 2

$array = [
    ["abc", "def"],
    ["ghi", "jkl"],
    ["mno", "pqr"],
    ["abc", "def"],
    ["ghi", "jkl"],
    ["mno", "pqr"]
];

$array = array_map("unserialize", array_unique(array_map("serialize", $array)));
 
print_r($array);


/*
run:

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

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

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

)

*/

 

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