How to realize mobile phone registration and verification with php

Simply put, mobile phone authentication is similar to mobile phone registration.

Mobile phone verification:

First, you generate a string in the php code, which can be stored in the conversation, and then send this string to the user through the SMS service (this step requires buying and looking for an agent, provided that you get the user's correct mobile phone number), and then provide an input box for the user to input the comparison between the received verification code and the conversation.

Mobile phone registration:

The previous part is the same as above, and the extra step is to store the information in the user database after the verification is successful, and at most, let the user input a little more user information before storing it.

The above verification code can be extended, such as the validity time, which can be set directly in the session, and the limitation of expiration is enough.