php - 从数组中删除重复值

Question

即使我使用函数 array_unique，我也无法从数组中“移除” double 值!

<?php
    $tags_array = array() ; 
    $query_tags = $mysql->Query("SELECT words AS kw FROM users ") ;
    /****
    *
    * This query return something like Array([1] => PHP,ASP,NET [2] => Ruby,Jquery,php,asp_net [3] => Php,asp,visualbasic,c# [4] => [5] =>)
    *
    *****/
    while($fetch_tags = $mysql->Fetch($query_tags)) 
    {
        foreach(explode(',',$fetch_tags['kw']) as $kw => $value) 
        {
            if(empty($value)) ;
            else 
            {
                $value = ucwords(strtolower($value)) ;
                $tags_array[] = $value ;
            } 
        }
    }
$tags_array = array_values(array_unique($tags_array, SORT_STRING)) ; 
print_r($tags_array) ;
/******
*
* print_r show somethings like this Array([1] => Asp [2] => Php [3] => Php [4] => Ruby [5] => Jquery [6] => Php [7] => Asp_net [8] = >C# [9] => Asp) 
*
* IT'S ONLY AN EXAMPLE TO SHOW YOU THE SITUATION 
*****/
?>

Answer 1

确保返回的值实际上不是唯一的。例如

$foo = array("PHP","php","pHP","PHP ");
$foo = array_unique($foo);

仍将包含 4 个条目。

如果任何条目包含空格，您应该修剪这些空格。