Remove duplicate values from an array in PHP

Description

The following code shows how to remove duplicate values from an array.

Example

/*  w w  w .j a v a 2 s  .  co  m*/
<?php
    $a=array("a"=>"red","b"=>"green","c"=>"red");
    print_r(array_unique($a));
?>

The code above generates the following result.