How to remove duplicates from php two-dimensional array

The content of this article is about the method of deduplicating two-dimensional arrays in PHP. It has a certain reference value. Now I share it with you. Friends in need can refer to it

1. First Let’s take a look at the two-digit array that needs to be processed

Array
(
    [0] => Array
        (
            [0] => 5
            [1] => 6
        )

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

    [2] => Array
        (
            [0] => 5
            [1] => 7
        )

    [3] => Array
        (
            [0] => 5
            [1] => 6
            [2] => 14
            [3] => 28
        )

)

2. Convert the two-dimensional array to a one-dimensional array ($arr is your array above)

$result = array_reduce($arr, 'array_merge', array());

Look at the results

Array
(
    [0] => 5
    [1] => 6
    [2] => 5
    [3] => 5
    [4] => 7
    [5] => 5
    [6] => 6
    [7] => 14
    [8] => 28
)

3. Use array functions to remove duplicate values

$data = array_unique($result);

Array
(
    [0] => 5
    [1] => 6
    [4] => 7
    [7] => 14
    [8] => 28
)

Complete!

If there is an easier way, please give me some advice!

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PHP two-dimensional array sort array_multisort

Combining two PHP two-dimensional arrays Method

How to convert a two-dimensional array into a one-dimensional array in PHP

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