Check Composer Platform Requirements

Composer is a dependency manager for PHP that simplifies the process of managing project dependencies. When working on a PHP project, it's important to ensure that the system meets the required platform specifications for the packages and libraries the project relies on. This tutorial shows how to check Composer platform requirements.

Composer accepts the check-platform-reqs argument, which can be used to verify that the versions of the PHP and its extensions align with the platform requirements specified by the installed packages. This functionality is particularly useful for confirming that a production server have all the necessary extensions to successfully execute a project following its installation.

Navigate to project directory and run the following command:

composer check-platform-reqs

The output should look something like that:

composer-plugin-api  2.6.0      success                                       
composer-runtime-api 2.2.2      success                                       
ext-ctype            8.3.0      success                                       
ext-dom              20031129   success                                       
ext-iconv            8.3.0      success                                       
ext-json             8.3.0      success                                       
ext-libxml           8.3.0      success                                       
ext-mbstring         *          success provided by symfony/polyfill-mbstring 
ext-phar             8.3.0      success                                       
ext-tokenizer        8.3.0      success                                       
ext-xml              8.3.0      success
ext-xmlwriter        8.3.0      success
php                  8.3.0      success

This command can be useful for continuous integration pipeline. By regularly checking and ensuring that the system meets the platform requirements, we can prevent potential issues.