How does a website send a verification code to a mobile phone?

Currently, many websites send text messages to users' verification code information. How can this function be implemented? Currently, many websites send text messages to users' verification code information. How can this function be implemented?

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Currently, many websites send text messages to users' verification code information. How can this function be implemented?

First, find the SMS service provider and access the SMS service.

Developers call the service through the interface provided by the SMS service provider

The verification code sending process is as follows:

1. Website (mobile phone) request sending information
2. The server sends a request to the SMS service provider.
3. The text message service provider sends the information to the user's mobile phone through the carrier

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