How to change the reservation phone number on 12 123, and prompt that the verification code is expired after receiving the verification code input?

The reason is that there is a time limit to obtain the verification code on traffic control 12 123. Generally, the time limit is five minutes, more than five minutes. After changing the reservation phone number on 12 123, you will be prompted that the verification code has expired.

The reason why the verification code is limited to 5 minutes effectively prevents hackers from constantly trying to use specific programs to violently crack the login of specific registered users. In fact, using verification code is a popular way for many websites now, and we have realized this function in a relatively simple way.

Extended data:

Traffic management 12 123 verification code can effectively prevent hackers from constantly trying to log in to a specific registered user with a specific program to crack. In fact, using verification code is a popular way for many websites (such as China Merchants Bank's online personal banking and Baidu Community), and we have also realized this function in a relatively simple way.

In addition, try to use more than 6 passwords with mixed numbers, letters and symbols in the verification code, and don't use simple passwords such as 1234 or passwords that are the same as or similar to the user name, so as to avoid unnecessary troubles caused by someone stealing your account.

It's a bit troublesome to log in the traffic management 12 123 verification code, but this function is necessary and important for the password security of netizens. But still remind everyone to protect their passwords;