How to remove duplicate elements from an array in php

php method to remove duplicate elements from an array: You can use the built-in function array_unique() to achieve this. The array_unique() function is used to remove duplicate values ​​from the array and return the filtered array. If two or more array values ​​are the same, only the first value is retained.

php provides us with a large number of functions, among which the array_unique() function is used to remove duplicate values ​​in the array and return the filtered array.

(Learning video recommendation: php video tutorial)

If two or more array values ​​are the same, only the first value is retained, and the other values ​​​​are moved remove.

Grammar:

array_unique(array)

(Recommended tutorial: php graphic tutorial)

Example:

<?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!