How to Build Passwordless Auth Using TOTP With Twilio Verify in PHP
Blog post from Twilio
A Twilio tutorial explains how to build a PHP passwordless authentication application using time-based one-time passwords (TOTP) and the Twilio Verify API. The application guides users through entering a username, creating a Twilio Verify TOTP Factor, scanning a generated QR code or manually entering a seed in an authenticator app such as Authy or Google Authenticator, verifying the initial six-digit code, and validating future login codes. It uses a Slim-based PHP project with dependencies for Twilio integration, sessions, environment variables, Twig templates, flash messages, and QR-code generation, while Twilio credentials and a Verify Service SID are stored in a `.env` file. The tutorial outlines routes, forms, session handling, Factor creation, Factor verification, and challenge-based code validation, then demonstrates running the app locally on port 8080. It presents passwordless TOTP authentication as a way to reduce password-related risks and login friction while relying on users’ mobile authenticator applications and Twilio’s verification infrastructure.
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