Send One Time Passwords Over Voice Calls in PHP Using Twilio Verify

A system for sending one-time passwords over voice calls in PHP using Twilio Verify is presented, including prerequisites such as PHP 7.4 or higher with the PDO extension and MySQL database installed, a Twilio account, and Composer globally installed. The process involves creating a project directory, setting up a Twilio PHP helper library, configuring the database, and creating pages for registration and sign-in processes. The system includes security measures to prevent users from registering without verifying their phone number and protects against password injection attacks. A dashboard page is also provided for logged-in users, allowing them to access their account information and log out of the system.