How to Send Emails with CodeIgniter

CodeIgniter is presented as a PHP framework that streamlines web development through built-in libraries, including an Email library for sending messages. The walkthrough uses Docker and Bitnami’s CodeIgniter development container to create a local environment with PHP, MariaDB, and a web server, then explains the framework’s config, controller, and view structure. It configures a Mailer controller as the default route, builds a simple recipient form, and connects CodeIgniter’s email functionality to Mailtrap SMTP using domain-verification credentials. The tutorial then demonstrates sending and testing a basic email, enabling HTML message content, addressing multiple recipients, adding CC and BCC fields, and attaching files hosted locally or at external URLs. It concludes that Docker can simplify environment setup while CodeIgniter and Mailtrap provide a relatively accessible path for building email functionality.

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