How can I validate an SMS from SignalWire LAML webhook?

cafe_carl

I need to validate incoming SMS messages from the service SignalWire (make sure SignalWire it's sent from) for a PHP application where the SMS is sent via webhook and LAML to a URL I specify. SignalWire's documentation only covers Node.js and Python, and tells to use those libraries. There are no examples for PHP.

Originally asked by Richard on Stack Exchange (stackoverflow) (CC BY-SA 4.0).

uphilltech

Great question — answering as the UphillTech team:

SignalWire's PHP libraries rely on Twilio's libraries. Their LAML webhook is compatible with Twilio. Use Composer to get the PHP libraries for SignalWire: composer require signalwire-community/signalwire PHP where receiving the POST request when an SMS comes in should look similar to this: require_once('signalwire/vendor/autoload.php'); // Include the SignalWire lib. $signing_key = 'PF_KJ45jk3jhy....uU3'; // On your SignalWire API page. $validator = new Twilio\Security\RequestValidator($signing_key); $headers = getallheaders(); $signature = $headers['X-Twilio-Signature']; $url = 'https://example.com/handle-incoming-sms'; // Whatever your URL is. // Get rid of POST variables SignalWire...

Full answer by Richard: https://stackoverflow.stackexchange.com/a/78829182 (CC BY-SA 4.0).

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