Скачать или смотреть How to Change PHP CLI Version from 7.4 to 7.3 on Debian 9

Learn how to switch your PHP CLI version from 7.4 to 7.3 on Debian 9 with this straightforward guide. Perfect for developers needing specific PHP versions for their projects.
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How to Change PHP CLI Version from 7.4 to 7.3 on Debian 9

For developers and system administrators working on Debian 9, it is sometimes necessary to switch PHP CLI (Command Line Interface) versions to meet the requirements of specific projects. This guide will take you through the steps needed to change your PHP CLI version from 7.4 to 7.3.

Prerequisites

Before you proceed, ensure that you have the following:

Root or sudo access to your Debian 9 system.

PHP 7.3 and PHP 7.4 installed on your system.

Step-by-Step Process

Step 1: Verify Current PHP Version

First, check your current PHP CLI version by running:

[[See Video to Reveal this Text or Code Snippet]]

This should display the version of PHP currently in use.

Step 2: Install PHP 7.3 (if not already installed)

If PHP 7.3 is not already installed on your system, you can install it using:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Update Alternatives

Debian provides a mechanism called update-alternatives to manage multiple versions of applications like PHP. Modify your current PHP CLI alternative by implementing the following command:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Verify the Change

Once you've set the new alternative, verify that the change has been applied by running:

[[See Video to Reveal this Text or Code Snippet]]

This should now display PHP 7.3 as the active version.

Additional Considerations

Composer: If you are using Composer, ensure that it is also compatible with the PHP version you have switched to.

Web Server: Remember that this change only affects the CLI. If you need to change the PHP version for your web server, you will need to update the configuration files for your specific server (e.g., Apache, Nginx).

This simple guide should help you smoothly transition between PHP CLI versions, making your development environment more flexible and suited to the needs of various projects.