This PHP application uses Laravel as its framework and Twilio for sending SMS notifications when an exception occurs on the server. The application allows administrators to be notified in case of a server error, with customizable messages that include details about the error. The system also reads administrators' phone numbers from a JSON file, which is used to send alerts via text message. The code uses Laravel's built-in exception handling mechanism and extends it with custom functionality for sending SMS notifications using Twilio's REST API.