$max = Db::table('member')->max('id') ?? 0; 

if ($max < 100000) {
    $cd = $this->createNonceStr(6 - strlen($max));
    $max = str_pad($max, 6, $cd, STR_PAD_LEFT);

	}



	





	





	
public function createNonceStr($length = 16)
{
    $chars = '0123456789';
    $str = ''; for ($i = 0; $i < $length; $i++) {
        $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    } return $str;
}