Create Your First Application!
Get to know Nette Framework while creating a simple blog with comments. Let's begin!
After the first two chapters, you will have your own working blog and you'll be ready to publish your awesome posts, although the features will be pretty much limited after completing these two chapters. To make things nicer for your users, you should also read the following chapters and keep improving your application.
You can find the complete application on GitHub.
This QuickStart was written for Nette Framework 3.0 and PHP 7.1 or newer. The very first thing you should do is check if your server satisfies the requirements of the Nette Framework. It should most likely be fine, but just to be sure we won't start with a broken environment.
You can download the Nette Framework manually, but the recommended way of starting a new project is using Composer. If you don't know the Composer, you should definitely start with that. It's a really simple and useful tool, check out their documentation.
With Composer, you can download and install the application skeleton known as Web Project including Nette Framework very
easily. To do so, find your webroot directory (e.g.
C:\InetPub) in your command line and
execute the following command:
composer create-project nette/web-project nette-blog
Web Project will be downloaded into
If you couldn't use Composer, download
and extract the archive and copy it to the root directory of the webserver and rename to
nette-blog. The entire
framework is located in the
If you're developing on Mac OS X or Linux (or any other Unix based system), you need to configure write privileges to the webserver.
The Welcome Page
At this moment, the welcome page of the Web Project should be running. Try it by opening your browser and going to the following URL:
and you should see the Nette Framework welcome page:
The application works and you can now start making changes to it.
Web Project's Content
Web Project has the following structure:
<b>www/</b> ← web root directory └── <b>nette-blog/</b> ├── <b>app/</b> ← application directory │ ├── <b>config/</b> ← configuration files │ ├── <b>presenters/</b> ← presenter classes │ │ └── <b>templates/</b>← templates │ ├── <b>router/</b> ← configuration of URL addresses │ └── <b>Bootstrap.php</b> ← boot file ├── <b>log/</b> ← here you can find error message logs ├── <b>temp/</b> ← place for temporary files (cache, sessions, etc.) │ ├── <b>vendor/</b> ← libraries for your application │ └── <b>nette/</b> ← like your favorite framework :-) │ └── <b>www/</b> ← local web root - this is the only directory accessible from the web
directory directly accessible from the browser, so you can point the root directory of your web server here (you can configure it
in Apache, but let’s do it later as it’s not important right now).
The most important directory for you is
app/. You can find
Bootstrap.php file there, inside which is
a class that loads the framework and configures the application. It activates autoloading and
sets up the debugger and routes.
The Web Project contains a welcome page, which we can remove – feel free to delete the
app/Presenters/templates/Homepage/default.latte file and replace it with the text “Hello world!”.
An extremely important tool for development is a debugger called Tracy. Try to make some
errors in your
app/Presenters/HomepagePresenter.php file (e.g. remove a curly bracket from the definition of class
HomepagePresenter) and see what happens. A red-screen page will pop up with an understandable error description.
Tracy will significantly help you while hunting down errors. Also note the floating Debugger bar in the bottom right corner, which informs you about important runtime data.
In the production mode, Tracy is, of course, disabled and does not reveal any sensitive information. All errors are saved into
log/ directory instead. Just try it out. In
app/Bootstrap.php, find the following piece of code,
uncomment the line and change the method call parameter to
false, so it looks like this:
$configurator->setDebugMode(false); $configurator->enableTracy(__DIR__ . '/../log');
After refreshing the web page, the red-screen page will be replaced with the user-friendly message:
Now, look into the
log/ directory. You can find the error log there (in exception.log file) and also the page with
the error message (saved in an HTML file with a name starting with
// $configurator->setDebugMode(false); again. Tracy automatically enables debug mode on
localhost environment and disables it elsewhere.
Now, we can fix the bug and continue designing our application.