How to delete duplicate elements in an array in php

The way PHP deletes duplicate elements in an array is through the built-in function array_unique(). The array_unique() function is used to remove duplicate values ​​from the array and return the filtered array. Function syntax: [array_unique(array)].

To remove duplicate elements in an array, you can use the built-in function array_unique().

(Recommended learning: php tutorial)

Introduction to related functions:

array_unique() function is used to remove duplicate values ​​from the array. If two or more array values ​​are the same, only the first value is retained and the other values ​​are removed.

Note: The retained array will retain the key type of the first array item.

Syntax:

array_unique(array)

Return value:

Return the filtered array.

Code implementation:

<?php
$a=array("a"=>"red","b"=>"green","c"=>"red");
print_r(array_unique($a));
?>

Run result:

Array ( [a] => red [b] => green )

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