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Upgrading from Craft 2

The first step to upgrading your site to Craft 3 is updating the CMS itself.

Preparing for the Upgrade

Before you begin, make sure that:

  • you've reviewed the changes in Craft 3
  • your server meets Craft 3’s minimum requirements (Craft 3 requires PHP 7+ and at least 256 MB of memory allocated to PHP)
  • your site is running at least Craft 2.6.2788
  • your plugins are all up-to-date, and you’ve verified that they’ve been updated for Craft 3 (you can see a report of your plugins’ Craft 3 compatibility status from the Updates page in the Craft 2 control panel)
  • your database is backed up in case everything goes horribly wrong

Once you've completed everything listed above you can continue with the upgrade process.

Performing the Upgrade

The best way to upgrade a Craft 2 site is to approach it like you’re building a new Craft 3 site. So to begin, create a new directory alongside your current project, and follow steps 1-3 in the installation instructions.

With Craft 3 downloaded and prepped, follow these steps to complete the upgrade:

  1. Configure the .env file in your new project with your database connection settings from your old craft/config/db.php file.

    ::: tip Don’t forget to set DB_TABLE_PREFIX="craft" if that’s what your database tables are prefixed with. :::

  2. Copy any settings from your old craft/config/general.php file into your new project’s config/general.php file.

  3. Copy your old craft/config/license.key file into your new project’s config/ folder.

  4. Copy your old custom Redactor config files from craft/config/redactor/ over to your new project’s config/redactor/ directory.

  5. Copy your old custom login page logo and site icon files from craft/storage/rebrand/ over to your new project’s storage/rebrand/ directory.

  6. Copy your old user photos from craft/storage/userphotos/ over to your new project’s storage/userphotos/ directory.

  7. Copy your old templates from craft/templates/ over to your new project’s templates/ directory.

  8. If you had made any changes to your public/index.php file, copy them to your new project’s web/index.php file.

  9. Copy any other files in your old public/ directory into your new project’s web/ directory.

  10. Update your web server to point to your new project’s web/ directory.

  11. Point your browser to your control panel URL (e.g. http://my-project.test/admin). If you see the update prompt, you did everything right! Go ahead and click “Finish up” to update your database.

  12. If you had any plugins installed, you’ll need to install their Craft 3 counterparts from the “Plugin Store” section in the control panel. (See the plugins’ documentation for any additional upgrade instructions.)

Now that you have successfully upgraded your Craft 2 project to Craft 3, please take some time to review the changes in Craft 3.

Troubleshooting

I get the Craft installer when I access my control panel.

If this happens, it’s because your database connection settings in the .env file don’t quite match up to what they used to be. Most likely you forgot to set the correct DB_TABLE_PREFIX.

I’m getting a “Setting unknown property: craft\config\DbConfig::initSQLs” error.

The initSQLs database config setting was removed in Craft 3, as it was generally only used to fix MySQL 5.7 support in Craft 2, which isn’t necessary in Craft 3. Just open your config/db.php file and delete the line that begins with 'initSQLs'.