How to install custom version of symfony?

@elise_daugherty 

To install a custom version of Symfony, you can follow these steps:

1. Create a new directory where you want to install Symfony. mkdir my-symfony-project cd my-symfony-project
2. Initialize a new composer project. composer init --name=my/vendor-name/my-symfony-project
3. Open the composer.json file in a text editor and add the custom version of Symfony you want to install in the require section. For example, to install Symfony version 4.4, you can use: "require": { "symfony/symfony": "4.4.*" }
4. Save the composer.json file and run the composer install command to install Symfony. composer install Composer will download and install the specified version of Symfony along with its dependencies.
5. Verify the installation by checking the Symfony version. php bin/console --version You should see the custom version of Symfony you installed.

That's it! You have successfully installed a custom version of Symfony in your project.