How to Validate Phone Numbers in PHP with the Twilio Lookup API

This post by Sam Agnew explores the use of Twilio's Lookup API to validate phone numbers in PHP. To get started, developers need a Twilio account and the Twilio PHP library installed via Composer. The author provides an example code snippet that demonstrates how to perform a basic phone number lookup using the Twilio PHP library. The code can be used to check if a phone number exists and return its nationally formatted phone number. Additionally, the post discusses carrier lookups, which require an extra parameter and cost $0.005 per request. It also provides a function that takes a phone number as input and returns true if it's valid and false otherwise. The example code can be used anywhere in PHP code to check phone numbers.

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