PHP and Docker: How to build PHP applications using Docker

With the continuous development of cloud computing and containerization technology, Docker has become one of the preferred tools for developing and deploying applications. At the same time, PHP, as a popular programming language, is also widely used in various applications. This article will introduce how to use Docker to build PHP applications to help developers develop and deploy more efficiently.

1. Docker and its advantages

Docker is an open source containerization platform that can help developers easily build, package, publish and run applications. The main advantages of Docker are as follows:

1. Lightweight: Docker uses containerization technology, and each container can run independently, so that applications do not interfere with each other, which is equivalent to operating system level Isolate applications rather than requiring the support of the entire operating system like a virtual machine.
2. Efficient: By sharing the host's kernel, Docker occupies relatively few system resources and can achieve rapid start and stop, accelerating the deployment and expansion process of applications.
3. Environment consistency: The containers created in Docker are exactly the same, which can ensure the consistency of the development environment within the team, thus simplifying the development and deployment process.

2. Use Docker to build PHP applications

1. Install Docker

Before we start building PHP applications, we need to install Docker first , for specific operations, please refer to the official website instructions and will not be repeated here.

2. Create Dockerfile

Dockerfile is a text file containing instructions to guide Docker in the process of building an image. The following is a simple Dockerfile example:

FROM php:7.4-apache

COPY ./src /var/www/html/

Instruction FROM indicates using the Apache-based PHP 7.4 image. The command COPY means to copy the files in the src directory on the host to the /var/www/html/ directory in the container.

3. Build the image

Use the following command to build the image:

docker build -t my-php-app .

The parameter -t means naming the image my-php-app, . means using the Dockerfile in the current directory.

4. Run the container

Use the following command to run the container:

docker run -p 8080:80 my-php-app

Among them, the parameter -p means to change the 80 inside the container The port is mapped to port 8080 of the host, and my-php-app is the name of the image we built.

5. Visit the web page

Open the browser and enter http://localhost:8080/ in the address bar to visit us in the container Deployed PHP application.

At this point, we have successfully built a PHP application using Docker and run it in a container. This approach greatly simplifies the development and deployment process, while also providing better support for application expansion and maintenance.

3. Summary

This article introduces how to use Docker to build PHP applications. Through Docker’s containerization technology, we can easily create, package, publish and run applications, improving development and deployment efficiency. In the actual development and deployment process, more detailed configuration and optimization are required according to specific needs to obtain better results. I hope this article can be helpful to PHP developers and Docker beginners.

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