How to remove duplicate elements from an array in php

How to delete duplicate elements in an array in php: You can use the php built-in function array_unique() function to delete. The array_unique() function is used to remove duplicate elements from the array and return the filtered array.

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

(Recommended tutorial: php graphic tutorial)

Grammar:

array_unique(array)

(Recommended learning video: php video tutorial )

Code implementation:

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

Output result:

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

The above is the detailed content of How to remove duplicate elements from an array in php. For more information, please follow other related articles on the PHP Chinese website!