How to Approve Real Users and Block Fake Accounts at Sign Up with Lookup and Verify in PHP

A Twilio tutorial explains how to build a PHP sign-up system that reduces fake accounts by combining Lookup and Verify APIs in a staged identity-validation workflow. Using a Slim Framework project, the example collects a user’s name and phone number, first checks that the number is a mobile line, optionally verifies that it is active and reachable, and can compare the supplied first and last names against phone ownership data through Identity Match, accepting exact or high partial matches. Applicants who pass these background checks receive an SMS one-time passcode through Twilio Verify, which confirms possession of the phone number before approval. The tutorial supplies project setup requirements, environment variables, PHP routing and API-client code, Twig templates for sign-up, verification, and status pages, logging guidance, testing options including sandbox credentials and magic numbers, and notes on regional availability and pricing. It recommends arranging lower-cost Lookup checks before more expensive identity matching and verification to balance fraud prevention, user experience, and cost.

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