How to Successfully Migrate Your WordPress Multisite to a New Server?

Migrating a WordPress multisite to a new server or web host can seem alarming due to its complexity, but with the right tools and approach, you can achieve a smooth transition with minimal downtime. This guide walks you through the essentials of WordPress multisite migration, covering key preparations, using plugins for seamless migrations, manual migration steps for advanced users, and final post-migration checks to ensure your site remains fully functional.

Why WordPress Multisite Migration is Different?

Migrating a WordPress multisite differs from moving a single site. A multisite network hosts multiple sites under one installation, creating unique complexities. Therefore, a successful migration requires accurate steps to avoid data loss or service interruption. But worry not by following the methods outlined here, you can move your multisite safely.

Preparing for Migration: Essential Steps

Before diving into migration, make these preparations to prevent common errors:

1. Back-Up Your Site: Always start with a full backup. This backup will serve as a safety net, allowing you to restore the site if anything goes wrong.
2. Gather FTP/SFTP Credentials: Obtain credentials for current and target servers.
3. Disable Caching and Firewall Plugins: These plugins can interfere with migration. Turn them off and re-enable them after migration.
4. Check PHP Versions: Ensure both servers use matching PHP versions to avoid compatibility issues like HTTP 500 errors.

Method 1: Migrating Using a Plugin

Using a plugin simplifies the process and reduces the likelihood of errors. Migrate Guru is an ideal choice because it’s free for multisite migration and supports most web hosts.

Steps:

1. Install Migrate Guru: Install and activate the Migrate Guru plugin.
2. Set Up Your Account: Enter your email address to create an account.
3. Choose Your Destination Host: Select your target server from the list or choose FTP/cPanel if it’s not listed.
4. Provide Server Details: Enter FTP or cPanel credentials for the destination server.
5. Start Migration: The plugin validates credentials and initiates the migration process, showing real-time progress.
6. Complete and Confirm: Once the migration finishes, you’ll receive an on-screen confirmation and an email notification.

Benefits of Plugin Migration: This method is fast, reliable, and avoids the technical work of handling database configurations or file transfers manually.

Method 2: Migrating Manually

For those who prefer direct control, manual migration is possible. However, this method is more technical and can be time-consuming.

Steps:

1. Download WordPress Files: Use an FTP client like FileZilla to download your multisite files.
2. Export Database: Access your database via phpMyAdmin or Adminer, then export and save the SQL file.
3. Create a New Database: On the new server, create a database and user, granting all privileges to the user.
4. Update wp-config.php: Modify the database details in the wp-config.php file to point to the new database.
5. Upload Database: Use Adminer or phpMyAdmin on the new host to import the SQL file into the new database.
6. Upload WordPress Files to New Server: Transfer all files to the new server via FTP.

Note: Manual migration requires technical skills, and minor missteps can lead to site downtime or data loss. Ensure you have a full backup before beginning.

Method 3: Using Your Web Host’s Migration Service

Many web hosts offer migration services for free. This option is generally straightforward, as hosts like WP Engine, Flywheel, and Cloudways offer direct support for multisite migrations.

Steps:

1. Install the WP Engine Automated Migration Plugin: This plugin, powered by BlogVault, handles much of the migration process.
2. Enter Your Site’s URL and SFTP Credentials: The plugin will only migrate the wp-content directory and the database by default.
3. Initiate Migration: The plugin validates the credentials, and the migration begins.
4. Receive Confirmation: Once complete, you’ll receive a confirmation message.

This method is excellent for non-technical users who want a hands-off approach to migration.

Final Steps After Migration

To ensure everything works as expected after the migration, perform the following:

• Clear Caches: Clear your site, browser, and plugin caches.
• Verify Site Functionality: Test pages, posts, themes, links, and media to confirm proper operation.
• Reactivate SSL: If SSL isn’t enabled automatically, install it using plugins like Really Simple SSL.
• Update Database Tables: Confirm that multisite-related tables like wp_options, wp_site, wp_sitemeta, and others are correctly configured.

Troubleshooting Common Migration Issues

Here’s how to address common problems that may arise post-migration:

• HTTP 500 Errors: These can occur due to mismatched PHP versions or active caching plugins. Update the PHP settings or disable caching if you encounter this error.
• Database Connection Errors: If your wp-config.php file contains incorrect database details, you may see a “Database Connection Error.” Double-check the DB_NAME, DB_USER, DB_PASSWORD, and DB_HOST values in this file.

Conclusion

Migrating a WordPress multisite may appear challenging, but with careful preparation and the right method, you can transition seamlessly. Using a dedicated plugin like Migrate Guru offers a straightforward path, while manual migration provides greater control for advanced users. Lastly, remember that post-migration checks are critical to ensuring a smooth user experience. With these steps, you can confidently migrate your WordPress multisite to a new home.