55 lines
No EOL
2.2 KiB
Markdown
55 lines
No EOL
2.2 KiB
Markdown
[<< previous](5-router.md) | [next >>](7-inversion-of-control.md)
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### Controllers
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When I talk about a controller in this tutorial then I am just referring to a class that has handler methods. I am not talking about [MVC (Model-View-Controller)](http://martinfowler.com/eaaCatalog/modelViewController.html) controllers. MVC can't be implemented properly in PHP anyway, at least not in the way it was originally conceived. So forget about MVC and instead let's worry about [separation of concerns](http://en.wikipedia.org/wiki/Separation_of_concerns).
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Create a new folder inside the `src/` folder with the name `HelloWorld`. This will be where all your hello world related code will end up in. In there, create `HelloWorldController.php`.
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```php
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<?php
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namespace Example\HelloWorld;
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class HelloWorldController
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{
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public function helloWorld()
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{
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echo 'Hello World';
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}
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}
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```
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The autoloader will only work if the namespace of a class matches the file path and the file name equals the class name. At the beginning I defined `Example` as the root namespace of the application so this is referring to the `src/` folder.
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Now let's change the hello world route so that it calls your new controller method instead of the closure. Change your `Routes.php` to this:
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```php
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return [
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['GET', '/hello-world', [
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'Example\HelloWorld\HelloWorldController',
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'helloWorld',
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]],
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];
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```
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Instead of just a callable you are now passing an array. The first value is the fully namespaced controller classname, the second one the method name that you want to call.
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To make this work, you will also have to do a small refactor to the routing part of the `Bootstrap.php`:
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```php
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case \FastRoute\Dispatcher::FOUND:
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$className = $routeInfo[1][0];
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$method = $routeInfo[1][1];
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$vars = $routeInfo[2];
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$class = new $className;
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$class->$method($vars);
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break;
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```
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So instead of just calling a handler method you are now instantiating the controller object and then calling the method on it.
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Now if you visit `http://localhost:8000/hello-world` everything should work. If not, go back and debug. And of course don't forget to commit your changes.
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[<< previous](5-router.md) | [next >>](7-inversion-of-control.md) |