php多维数组编码转换

 public static function iconvUtf8(&$array){
        if(is_array($array)){
            foreach($array as $key => &$value){
                if(is_array($value)){
                    self::iconvUtf8($value);
                }else{
                    $encode = mb_detect_encoding($value, array("ASCII","UTF-8","GB2312","GBK","BIG5"));
                    $value = iconv($encode,'utf-8',$value);
                }
            }
        }
        return $array;
    }

引用传值，直接转换即可，支持多维