57 lines
2.3 KiB
Markdown
57 lines
2.3 KiB
Markdown
|
[<< previous](5-router.md) | [next >>](7-inversion-of-control.md)
|
||
|
|
|
||
|
|
### Dispatching to a Class
|
||
|
|
|
||
|
|
In this tutorial we won't implement [MVC (Model-View-Controller)](http://martinfowler.com/eaaCatalog/modelViewController.html). 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).
|
||
|
|
|
||
|
|
Instead of just calling everything a controller, let's give our names descriptive names that describe what the class actually does. In this case, we will just display content, so a fitting name would be `Presenter`. If the class does something else, we will name it accordingly.
|
||
|
|
|
||
|
|
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 `HelloWorldPresenter.php`.
|
||
|
|
|
||
|
|
```php
|
||
|
|
<?php
|
||
|
|
|
||
|
|
namespace Example\HelloWorld;
|
||
|
|
|
||
|
|
class HelloWorldPresenter
|
||
|
|
{
|
||
|
|
public function helloWorld()
|
||
|
|
{
|
||
|
|
echo 'Hello World';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
Now let's change the hello world route so that it calls your new class method instead of the closure. Change your `Routes.php` to this:
|
||
|
|
|
||
|
|
```php
|
||
|
|
return [
|
||
|
|
['GET', '/hello-world', [
|
||
|
|
'Example\HelloWorld\HelloWorldPresenter',
|
||
|
|
'helloWorld',
|
||
|
|
]],
|
||
|
|
];
|
||
|
|
```
|
||
|
|
|
||
|
|
Instead of just a callable you are now passing an array. The first value is the fully namespaced classname, the second one the method name that you want to call.
|
||
|
|
|
||
|
|
To make this work, you will also have to do a small refactor to the routing part of the `Bootstrap.php`:
|
||
|
|
|
||
|
|
```php
|
||
|
|
case \FastRoute\Dispatcher::FOUND:
|
||
|
|
$className = $routeInfo[1][0];
|
||
|
|
$method = $routeInfo[1][1];
|
||
|
|
$vars = $routeInfo[2];
|
||
|
|
|
||
|
|
$class = new $className;
|
||
|
|
$class->$method($vars);
|
||
|
|
break;
|
||
|
|
```
|
||
|
|
|
||
|
|
So instead of just calling a method you are now instantiating an object and then calling the method on it.
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
[<< previous](5-router.md) | [next >>](7-inversion-of-control.md)
|