| Including Swift Mailer (Autoloading)
====================================
If you are using Composer, Swift Mailer will be automatically autoloaded.
If not, you can use the built-in autoloader by requiring the
``swift_required.php`` file::
    require_once '/path/to/swift-mailer/lib/swift_required.php';
    /* rest of code goes here */
If you want to override the default Swift Mailer configuration, call the
``init()`` method on the ``Swift`` class and pass it a valid PHP callable (a
PHP function name, a PHP 5.3 anonymous function, ...)::
    require_once '/path/to/swift-mailer/lib/swift_required.php';
    function swiftmailer_configurator() {
        // configure Swift Mailer
        Swift_DependencyContainer::getInstance()->...
        Swift_Preferences::getInstance()->...
    }
    Swift::init('swiftmailer_configurator');
    /* rest of code goes here */
The advantage of using the ``init()`` method is that your code will be
executed only if you use Swift Mailer in your script.
.. note::
    While Swift Mailer's autoloader is designed to play nicely with other
    autoloaders, sometimes you may have a need to avoid using Swift Mailer's
    autoloader and use your own instead. Include the ``swift_init.php``
    instead of the ``swift_required.php`` if you need to do this. The very
    minimum include is the ``swift_init.php`` file since Swift Mailer will not
    work without the dependency injection this file sets up:
    .. code-block:: php
        require_once '/path/to/swift-mailer/lib/swift_init.php';
        /* rest of code goes here */
 |