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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