Build a Custom WordPress Plugin to Send SMS with Twilio Programmable Messaging

This WordPress plugin allows users to send bulk SMS using Twilio Programmable Messaging. The plugin creates a settings page where users can input their Twilio API credentials, and then sends an SMS message to a specified recipient based on the provided details. The plugin also includes functionality for displaying success or error messages when sending messages. It uses the WordPress Settings API to create a user-friendly interface for managing settings, and hooks into WordPress's admin_init action to send messages whenever they are initiated.