added code formatting

1-front-controller.md

@@ -16,7 +16,7 @@ So instead of doing that, create a folder in your project folder called `public`
 
 Inside the `public` folder you can now create your `index.php`. Remember that you don't want to expose anything here, so put just the following code in there:
 
-```
+```php
 <?php 
 
 require '../src/Bootstrap.php';
@@ -28,7 +28,7 @@ The rest of the public folder is reserved for your public asset files (like Java
 
 Now navigate inside your `src` folder and create a new `Bootstrap.php` file with the following content:
 
-```
+```php
 <?php 
 
 echo 'Hello World!';

2-composer.md

@@ -12,7 +12,7 @@ Create a new file in your project root folder called `composer.json`. This is th
 
 Add the following content to the file:
 
-```
+```json
 {
     "name": "Project name",
     "description": "Your project description",
@@ -42,7 +42,7 @@ Open a new console window and navigate into your project root folder. There run
 
 Composer creates a `composer.lock` file that locks in your dependencies and a vendor directory. To remove those from your Git repository, add a new file in your project root folder called `.gitignore` with the following content:
 
-```
+```php
 composer.lock
 vendor/
 ```

3-error-handler.md

@@ -12,7 +12,7 @@ An alternative package would be: [PHP-Error](https://github.com/JosephLenton/PHP
 
 To install a new package, open up your `composer.json` and add the package to the require part. It should now look like this:
 
-```
+```php
 "require": {
     "php": ">=5.5.0",
     "filp/whoops": ">=1.1.2"
@@ -29,7 +29,7 @@ For development that does not make sense though -- you want a nice error page. T
 
 Then after the error handler registration, throw an `Exception` to test if everything is working correctly. Your `Bootstrap.php` should now look similar to this:
 
-```
+```php
 <?php
 
 namespace Example;

4-http.md

@@ -14,7 +14,7 @@ In this tutorial I will use my own HTTP component, but of course you can use whi
 
 Again, edit the `composer.json` to add the new component and then run `composer update`:
 
-```
+```json
 "require": {
     "php": ">=5.5.0",
     "filp/whoops": ">=1.1.2",
@@ -24,7 +24,7 @@ Again, edit the `composer.json` to add the new component and then run `composer
 
 Now you can add the following below your error handler code in your `Bootstrap.php` (and don't forget to remove the exception):
 
-```
+```php
 $request = new \Http\HttpRequest($_GET, $_POST, $_COOKIE, $_FILES, $_SERVER);
 $response = new \Http\HttpResponse;
 ```
@@ -33,7 +33,7 @@ This sets up the `Request` and `Response` objects that you can use in your other
 
 To actually send something back, you will also need to add the following snippet at the end of your `Bootstrap.php` file:
 
-```
+```php
 foreach ($response->getHeaders() as $header) {
     header($header);
 }
@@ -45,14 +45,14 @@ This will send the response data to the browser. If you don't do this, nothing h
 
 Right now it is just sending an empty response back to the browser with the status code `200`; to change that, add the following code between the code snippets from above:
 
-```
+```php
 $content = '<h1>Hello World</h1>';
 $response->setContent($content);
 ```
 
 If you want to try a 404 error, use the following code:
 
-```
+```php
 $response->setContent('404 - Page not found');
 $response->setStatusCode(404);
 ```

5-router.md

@@ -14,7 +14,7 @@ By now you know how to install Composer packages, so I will leave that to you.
 
 Now add this code block to your `Bootstrap.php` file where you added the 'hello world' message in the last part.
 
-```
+```php
 $dispatcher = \FastRoute\simpleDispatcher(function (\FastRoute\RouteCollector $r) {
     $r->addRoute('GET', '/hello-world', function () {
         echo 'Hello World';
@@ -48,7 +48,7 @@ This setup might work for really small applications, but once you start adding a
 
 Create a `Routes.php` file in the `src/` folder. It should look like this:
 
-```
+```php
 <?php
 
 return [
@@ -63,7 +63,7 @@ return [
 
 Now let's rewrite the route collection part to use the `Routes.php` file.
 
-```
+```php
 $routeDefinitionCallback = function (\FastRoute\RouteCollector $r) {
     $routes = include('Routes.php');
     foreach ($routes as $route) {

8-dependency-injector.md

@@ -4,7 +4,7 @@
 
 A dependency injector resolves the dependencies of your class and makes sure that the correct objects are injected when the class is instantiated.
 
-My favorite injector is [Auryn](https://github.com/rdlowrey/Auryn), so install `rdlowrey/auryn` with composer or use one of the alternatives below:
+My favorite injector is [Auryn](https://github.com/rdlowrey/Auryn), so install `rdlowrey/auryn` with composer or use one of these alternatives:
 [Pimple](http://pimple.sensiolabs.org/), [Orno DI](https://github.com/orno/di), [PHP-DI](https://github.com/mnapoli/PHP-DI)
 
 Create a new file called `Dependencies.php` in your `src/` folder. In there add the following content: