How to remove duplicate values ​​from multidimensional array in PHP?

During the development of PHP projects, sometimes we need to remove duplicate values ​​from multi-dimensional arrays in PHP frameworks, such as laravel, codeigniter and zend, etc. Below, we will introduce to you how to delete duplicate values ​​from PHP multi-dimensional arrays with specific examples.

In the example below, there is a simple multi-dimensional array with repeated values, then we can pass PHP array_map() and The array_unique() function is used to obtain unique values ​​from multi-dimensional arrays, that is, to remove duplicate values ​​from multi-dimensional arrays.

PHP Multidimensional Array:

Array
(
[0] => Array
(
[0] => php
[1] => sql
)

[1] => Array
(
[0] => javascript
[1] => c
)

[2] => Array
(
[0] => php
[1] => sql
)

[3] => Array
(
[0] => c++
[1] => java
)

)

Remove duplicate values:

$myArray = Array(
          Array('php','sql'),
          Array('javascript','c'),
          Array('php','sql'),
          Array('c++','java')
        );

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

print_r($myArray);

Output:

Array
(
[0] => Array
(
[0] => php
[1] => sql
)

[1] => Array
(
[0] => javascript
[1] => c
)

[3] => Array
(
[0] => c++
[1] => java
)

)

Related recommendations: "PHP Tutorial"

This article is about the method of deleting duplicate values ​​from PHP multi-dimensional arrays. It is simple and easy to understand. I hope Help those in need!

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