1、检验路径是否正确

正确返回 1 ，错误返回0

public function index()
    {
        //变量： /uploads/20210702/9dfda2411084c0c149c084d6f4d8bbf0.db
        $pattern = '/\/uploads\/[0-9]{8}\/[0-9a-z]+\.db/';
        $path="/uploads/20210702/9dfda2411084c0c149c084d6f4d8bbf0.db";
        echo preg_match($pattern,$path);
    }