Integrating Voice Call OTP Verification in a Symfony Application with Twilio

This tutorial guides developers through integrating voice call OTP verification into a Symfony application using Twilio Programmable Voice. The process involves creating registration, login, and verification pages for users to enter received OTPs, enabling them to access the application securely. Prerequisites include PHP 8.1 or higher, Composer installed globally, the Symfony CLI, a Twilio account with an active phone number, and basic knowledge of Symfony and Doctrine. The tutorial covers setting up the database, creating required entities, form types, authentication controller, installing the Twilio PHP SDK, storing access tokens in the .env file, adding functionality for sending verification codes, and more.