Why Does Composer Show a \'PHP Version Does Not Satisfy Requirements\' Error After a PHP Upgrade?

Composer Error "Your PHP version does not satisfy requirements" after Upgrading PHP

If you have updated your PHP version and encounter an error like "acme/some-package[1.0.0, ..., 1.4.0] requires php ^5.6.4 || ^7.0 -> your php version (8.0.3) does not satisfy that requirement" when running composer update on an existing project, it means that some of the dependencies in your composer.json file no longer meet the PHP version requirements.

This error occurs because PHP 8 contains major changes and enhancements, and some plugins may not fully support it yet. To resolve this issue, you can use the following command to ignore specific platform requirements during the composer installation:

composer install --ignore-platform-req=php

Alternatively, you can use the --ignore-platform-reqs flag to ignore all platform requirements:

composer install --ignore-platform-reqs

These options allow you to specify which requirements Composer should ignore during the installation process. However, it's important to note that ignoring platform requirements may lead to compatibility issues with certain dependencies. Therefore, it's recommended to consult the documentation of the specific plugins causing errors to determine if there are updated versions that support PHP 8.

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