Remove duplicate values from an array in PHP

You can use the PHP array_unique() function remove duplicate values from an array. If two or more array values are the same, the first appearance will be kept and the other will be removed.

array_unique() through we can get only unique value from an array. In the below example i have “green” value two times in an array but when i use array_unique() function then it will return only unique value as below output:

$arr = array("green", "red", "green", "yellow", "red"); 
$result = array_unique($arr); // Deleting the duplicate items 


    [0] => green
    [1] => red
    [3] => yellow

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