php unique values in array code example

Example 1: array_unique

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

Array
(
    [a] => green
    [0] => red
    [1] => blue
)

Example 2: unique key value array php

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

Example 3: php check for duplicates in array

function has_dupes($array) {
    $dupe_array = array();
    foreach ($array as $val) {
        if (++$dupe_array[$val] > 1) {
            return true;
        }
    }
    return false;
}