N维数组编码转换

function encodeUTF8($array){  
    foreach($array as $key=>$value){  
        if(!is_array($value)){  
            $array[$key]=mb_convert_encoding($value,"UTF-8","auto");  
        }else{  
            $array[$key] = encodeUTF8($value);  
        }  
    }  
    return $array;  
}