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πŸŽ“ Tutorial Quick Start: official intro to Nette Framework by creating blog.

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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 tutorial on Nette website.

Please install full-featured IDE and all necessary plugins, it will make you extremely efficient.

This QuickStart was written for Nette Framework 3.1 and PHP 7.4 or newer.

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. /var/www or 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 nette-blog directory.

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 vendor folder.

If you're developing on macOS 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:

http://localhost/nette-blog/www/

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>nette-blog/</b>
β”œβ”€β”€ <b>app/</b>              ← application directory
β”‚   β”œβ”€β”€ <b>Presenters/</b>   ← presenter classes
β”‚   β”‚   └── <b>templates/</b>← templates
β”‚   β”œβ”€β”€ <b>Router/</b>       ← configuration of URL addresses
β”‚   └── <b>Bootstrap.php</b> ← booting class Bootstrap
β”œβ”€β”€ <b>bin/</b>              ← scripts for the command line
β”œβ”€β”€ <b>config/</b>           ← configuration files
β”œβ”€β”€ <b>log/</b>              ← error logs
β”œβ”€β”€ <b>temp/</b>             ← temporary files, cache, …
β”œβ”€β”€ <b>vendor/</b>           ← libraries installed by Composer
β”‚   └── <b>autoload.php</b>  ← autoloading of libraries installed by Composer
└── <b>www/</b>              ← public folder - the only place accessible from browser
    └── <b>index.php</b>     ← initial file that launches the application

Directory www is supposed to store images, JavaScript, CSS, and other publicly available files. This is the only 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.

Cleanup

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!".

Tracy (Debugger)

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 Tracy 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 exception).

Comment line // $configurator->setDebugMode(false); again. Tracy automatically enables development mode on localhost environment and disables it elsewhere.

Now, we can fix the bug and continue designing our application.

Read more

The tutorial continue on the Nette website.

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