Docker practice: quickly install Symfony and configure the development environment

Introduction:
With the rapid development of cloud computing and containerization technology, Docker has become a modern application One of the important tools for program development and deployment. Symfony, as a popular PHP framework, can also quickly install and configure the development environment through Docker. This article will introduce how to use Docker to install Symfony, detail the configuration steps of the development environment, and provide corresponding code examples.

Part One: Installing Docker
To start using Docker, you first need to install Docker on your local machine. Please follow the guidelines provided by the official Docker documentation to download and install the Docker version appropriate for your operating system. After the installation is complete, you can verify that Docker has been installed successfully by entering "docker --version" in the terminal or command prompt.

Part 2: Install Symfony using Docker

1. Create a Symfony project
   Open a terminal or command prompt and go to the directory where you want to store your Symfony project. Create a new Symfony project using the following command:

docker run -it --rm -v $(pwd):/app composer create-project symfony/website-skeleton myproject
cd myproject

This command will create a new Symfony project named "myproject" and store it in the current directory.

2. Build Docker Image
   Create a file named "Dockerfile" in the root directory of the Symfony project and add the following content:

FROM php:7.4.2-apache

RUN apt-get update && apt-get install -y 
    libicu-dev 
    && docker-php-ext-install -j$(nproc) intl

RUN a2enmod rewrite

COPY . /var/www/html/

This Dockerfile Used PHP 7.4.2 and Apache as the base image, and installed the Intl extension required by Symfony. Additionally, we enabled Apache’s rewrite module and copied all of the Symfony project’s files into the container’s /var/www/html/ directory.

3. Build Docker Image
   Run the following command in the root directory of the Symfony project to build a new Docker image using the above Dockerfile:

docker build -t symfony-app .

This command will be based on The Dockerfile in the current directory builds a new image named "symfony-app".

4. Run the Symfony application
   Run the following command to start the Symfony application:

docker run -d -p 8000:80 --name symfony-app symfony-app

This command will start a container named "symfony-app", And map it to port 8000 of the host.

5. Access the Symfony application
   Access "http://localhost:8000" in the browser to view the running Symfony application.

Part 3: Configuring the Symfony development environment
The Symfony application has successfully run in the Docker container, now we need to make some common configurations for the development environment.

1. Configuring the database connection
   Open the ".env" file in the root directory of the Symfony project, find the following line, and modify it to suit your database settings:

DATABASE_URL=mysql://db_user:db_password@database_host:database_port/db_name

Replace "db_user" with your database username, "db_password" with your database password, "database_host" with your database host, "database_port" with your database port, and "db_name" is your database name.

2. Run database migration
   Go to the root directory of the Symfony project in the terminal or command prompt and run the following command to run the database migration:

docker exec -it symfony-app bin/console doctrine:migrations:migrate

This command Any pending database migrations will be applied.

3. Install the Symfony runtime component
   Go to the root directory of the Symfony project in a terminal or command prompt and run the following command to install the Symfony runtime component:

docker exec -it symfony-app composer install

This command will install all required Symfony runtime components.

4. Configure development tools
   If you want to use development tools, such as PHPStorm, to connect to the Symfony container, please use the following configuration:
5. Container name (container ID): symfony- app
6. Server: localhost
7. Port: 8000
8. Mapped to the directory in the code: /var/www/html

In this way, you You can edit and debug code directly in the Symfony container through development tools.

Conclusion:
Through Docker, we can quickly and easily install and configure the Symfony development environment. This article provides detailed steps and code examples to help readers quickly get started and start developing with Symfony. Using Docker, we can easily set up and switch development environments, improving development efficiency and code quality. I wish you success in your Symfony development journey!

(Note: The above code examples are for reference only, please adjust and modify according to the actual situation.)

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