<?php $fruits_list = array('Orange', 'Apple', ' Banana', 'Cherry', ' Banana'); $result = array_unique($fruits_list); print_r($result); ?> Output: Array ( [0] => Orange [1] => Apple [2] => Banana [3] => Cherry )
$arr = array(1, 4, 6, 1, 8, 9, 4, 6); $unique = array_unique($arr); $duplicates = array_diff_assoc($arr, $unique); print_r($duplicates); Array ( [3] => 1 [6] => 4 [7] => 6 )
$str = implode(',',array_unique(explode(',', $str)));