如何在php中扩展多个类？

Question

I would like to create a form in my "contactus" page. I'm following this tutorial . I have to extends the sfFrom class to use sfWidget, but in my code I've already extends BaseController.

Is there any solution to do this without making a new class?

class InfoController extends BaseController
{
    /**
     *
     * @Route("/contactus", name="info_contactus_page")
     * @Template()
     */
    public function contactusAction()
    {
        return array();
    }
}

Answer 1

You're doing all wrong.

symfony 1 is completely different than Symfony 2 (check this article: How Symfony2 differs from symfony1 ). You follow a tutorial from sf1 to create form in sf2.

You should instead try to find resources for sf2, like :

• Official Form documentation
• Lots of recipes in the official Form Cookbook

And since you're french, I recommend you to read these tutorials:

• Les formulaires dans Symfony2
• Créer des formulaires avec Symfony2

Then, when you will have read these tutorials, you can come back here to ask a new question about a problem you got when implementing a form.

Answer 2

use composition or interfaces.

In your case composition is solution.

PHP does not allow multiple inheritance

Answer 3

If you can use PHP5.4, use traits: http://php.net/manual/en/language.oop5.traits.php

<?php 

trait SomeOtherControllerTrait {
    function SomethingSomethingSomething() { /* Something */ }
}

class InfoController extends BaseController {
    use SomeOtherControllerTrait;
    /* ... */
}

They allow you to get similar result to multiple inheritence by using composition.

EDIT: Since the tags underneath the question changed to Symfony2: You don't need the multiple inheritance since Symfony2 handled this situation in a different way. The accepted answer described it well.