Non-DI Example

non-di.php

<?php

class Foo extends Container {

    public function send_mail()
    {
        $mailer = Swift_Mailer::newInstance('mail');

        $mailer->newMessage('Wonderful Subject')
               ->setFrom(array('[email protected]' => 'John Doe'))
               ->setTo(array('[email protected]', '[email protected]' => 'A name'))
               ->setBody('Here is the message itself');

        return $mailer->send();
    }

}