<?php
$input = array("a"=>"apple", "pear", "b"=>"apple", "orange", "avocado", "banana");
print_r($input);
$result = array_unique($input);
print_r($result);
?>

http://www.apphp.com/index.php?snippet=php-remove-duplicates-in-array

This code allows to remove all duplicate elements from an array using PHP array_unique() function.

Remove duplicate elements from array in PHP

php

PHP