Upgrade Fuel Version and PHP version

I'm on Fuel 1.4.13 and PHP 7.1.33 and want to upgrade to the latest fuel and PHP 8.1 what are the steps in order so that this is a relatively painless upgrade?


  • Copy over the ./fuel/codeigniter and ./fuel/modules/fuel folders from the v1.5.2 package. Also copy over the ./fuel/application/config/purifier.php file.
    Compare your ./application/config/database.php and ./application/config/config.php files with the v1.5.2 versions - there are subtle differences.

    Upgrade your PHP and remember to activate the necessary modules (rewrite etc.)

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