How to use environment variables in Symfony?

@wilmer.lemke 

In Symfony, you can use environment variables to store configuration values that may vary between different environments (e.g. development, staging, production). This allows you to use the same codebase for different environments, while still being able to customize certain aspects of the application based on the environment.

To use environment variables in Symfony, you can use the %env()% syntax in your configuration files. For example, to use an environment variable named DATABASE_URL, you would use %env(DATABASE_URL)% in your configuration file.

Here is an example of how you might use an environment variable in a Symfony application:

In your .env file:

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DATABASE_URL=mysql://user:password@localhost:3306/database

In your config/packages/doctrine.yaml file:

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doctrine:
    dbal:
        url: '%env(DATABASE_URL)%'

You can also use environment variables in your PHP code using the $_SERVER or getenv() functions. For example:

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$databaseUrl = getenv('DATABASE_URL');

It's also possible to define environment variables in the .env.local file, which is automatically loaded by the Symfony application. This is useful for setting environment-specific configuration values on your local development machine.

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DATABASE_URL=mysql://user:password@localhost:3306/local_database

I hope this helps! Let me know if you have any questions.

@wilmer.lemke 

To use environment variables in Symfony, you can follow these steps:

1. Install Dotenv: Run the following command in your Symfony project's root directory: composer require symfony/dotenv
2. Configure environment variables: Create a .env file in your project's root directory. Define your environment variables in the .env file, following the KEY=VALUE format. For example: DATABASE_URL=mysql://db_user:db_pass@localhost/db_name
3. Load the environment variables: In your Symfony project's public/index.php file, add the following line after require __DIR__.'/../vendor/autoload.php';: SymfonyComponentDotenvDotenv::bootEnv(__DIR__.'/../.env');
4. Access the environment variables in your Symfony configuration files: You can access the environment variables using the getenv('KEY') function, where 'KEY' is the name of your variable. For example, to access the DATABASE_URL variable, you can use getenv('DATABASE_URL') in your config/packages/doctrine.yaml file.

That's it! You can now use environment variables in your Symfony application.