Tips for quickly changing PHP version in a virtual machine

Techniques for quickly changing the PHP version in a virtual machine

With the continuous development of web development technology, PHP, as a popular back-end programming language, is constantly updated and iterated , different projects may require different versions of PHP to support. In a virtual machine environment, how to quickly and conveniently change the PHP version has become a concern for many developers. This article will introduce some tips and specific code examples to help developers quickly change the PHP version in a virtual machine.

1. Multi-version coexistence

In the virtual machine, we can manage different versions of PHP through multi-version coexistence. Each version of PHP can be installed separately in different directories, and different versions of PHP can be switched through soft links. The following are the specific steps:

1. Install multiple versions of PHP in the virtual machine, assuming we have installed PHP 7.2 and PHP 7.4.
2. Set different versions of PHP configuration files, and store different versions of php.ini and php-fpm.conf configuration files in different directories.
3. Create soft links to link different versions of PHP executable files to a unified directory, such as the /usr/bin/ directory.

4. Switch different versions of PHP by changing the value of the environment variable PATH. For example, you can switch the PHP version through the following command:

   export PATH=/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/local/php7.2/bin

Through the above operations, we can quickly switch the PHP version through the coexistence of multiple versions in the virtual machine.

2. Through Docker container

Another way to quickly change the PHP version is to use a Docker container. Docker is a lightweight container technology that can quickly build and deploy applications. We can quickly switch PHP versions by deploying different versions of PHP in Docker containers. The following are the specific steps:

1. Install Docker on the local host and pull different versions of PHP images. For example, you can use the following command to pull the PHP 7.2 image:

   docker pull php:7.2-fpm

2. Create and run a PHP container. You can use the following command to quickly create and start a PHP 7.2 container:

   docker run -d --name php72 -p 9000:9000 -v /path/to/php72/config:/usr/local/etc/php php:7.2-fpm

3. Connect to the container through the container name or container ID, and enter the container to operate:

   docker exec -it php72 bash

4. Inside the container, you can use different commands to manage PHP versions, such as switching configuration files, installing extensions, etc.

By using Docker containers, we can easily create different versions of PHP environments and quickly switch PHP versions without affecting the local host environment.

Conclusion:

This article introduces two common ways to quickly change the PHP version in a virtual machine, and provides specific operating steps and code examples. Through multi-version coexistence and Docker containers, developers can easily manage different versions of PHP to adapt to the needs of different projects. I hope this article will help developers quickly change the PHP version in a virtual machine.

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