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I've got a site smoothly running on Drupal 9.4.8 and PHP 8.1. Now I would like to enable APCu in PHP, but my provider unfortunately has installed APCu for PHP 8.0 only. If I simply switch to PHP 8.0, my Drupal installation gives me a an error message:

Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 8.1.0".

Which steps do I have to do, in order to make my site work in PHP 8.0?

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1 Answer 1

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Assuming the platform on which you set dependencies is running a different version of PHP than 8.0, you do the following:

  1. Ensure that if there is a direct php dependency in the requires section of composer.json, that it is >=8.0 or similar.
  2. Set a target platform version with composer config platform.php 8.0.24. The specific version you put here does not have to match the server platform's version exactly.
  3. composer update.
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