Teach you how to install Symfony in Docker

Teach you how to install Symfony in Docker

Symfony is a popular PHP web application framework that is widely used in projects of all sizes. Using Docker containerization technology, we can easily deploy, run and test Symfony applications in different environments. This article will take you step by step to understand how to install Symfony in Docker and provide detailed code examples for reference.

Step 1: Install Docker
First, you need to install Docker on your system. The specific installation steps vary depending on your operating system. You can refer to the official Docker documentation for installation. Once the Docker installation is complete, you can verify the successful installation by running the docker --version command (you should see output similar to: Docker version 20.10.0).

Step 2: Create a Docker container
Next, we need to create a Docker container that can run the Symfony application. For convenience, we will use the Docker image officially provided by Symfony. Create a file named docker-compose.yml in the project root directory and add the following content in it:

version: '3'
services:
  php:
    image: symfony_php
    volumes:
      - .:/var/www/html
  webserver:
    image: symfony/apache-pack
    ports:
      - 80:80
    links:
      - php
    volumes:
      - .:/var/www/html

In the above code, we define two services:php and webserver. phpThe service uses the PHP image officially provided by Symfony, mounts the current directory to the /var/www/html directory of the container, and can communicate with webserver through the network inside the container Services communicate. webserver The service uses the Apache image officially provided by Symfony and maps the container's port 80 to the host's port 80 so that we can access the Symfony application through our browser.

Step 3: Build and start the container
Execute the following command in the project root directory to build and start the Docker container:

docker-compose up -d

This command will be based on docker-compose .yml file definition, automatically pulls the required image, and creates and starts the container. Once completed, you can verify that the container ran successfully by running the docker ps command (you should see output similar to: CONTAINER ID IMAGE COMMAND ...).

Step 4: Install Symfony
Now, we can install the Symfony application in the Docker container. First, enter the php container and execute the following command:

docker-compose exec php bash

This will enter the terminal of the PHP container. In the terminal, we can use Composer to install Symfony. Execute the following command to install the latest version of Symfony (you can also specify the specific version according to project requirements):

composer create-project symfony/website-skeleton my_project_name

This command will be installed in the container at /var/www/html/my_project_nameCreate a new Symfony project in the directory. Once the installation is complete, you can exit the container terminal by:

exit

Step 5: Access the Symfony application
Now, we can access the Symfony application through the browser. Enter http://localhost in your browser, and you should see the Symfony welcome page, indicating a successful installation.

Summary:
Through the above steps, we successfully installed the Symfony application in Docker. Using Docker containerization technology, we can quickly deploy, run and test Symfony applications, while also making the application development and production environments more consistent. I hope this article will help you install Symfony in Docker. If you are more interested in the Symfony framework or Docker containerization technology, you can learn more about their related documents and resources.

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