Force upgrade your WordPress database to utf8mb4 via WP-CLI.
## Description
This WordPress plugin is designed to upgrade your WordPress database to utf8mb4 via WP-CLI. The plugin will go through each table in your database and upgrade its collation to `utf8mb4_unicode_ci`.
Why would you do this? Maybe your database missed this conversion when WordPress 4.2 first shipped. If it did, you may be [affecting your site's performance](https://www.percona.com/blog/charset-and-collation-settings-impact-on-mysql-performance/).
## Installation
1. Upload the plugin files to the `/wp-content/plugins/utf8mb4-database-upgrader-cli` directory, or install the plugin through the WordPress plugins screen directly.
2. The plugin can be run via WP-CLI with the following command: `wp upgrade_utf8mb4`.
## Requirements
- WordPress 4.2 or higher
- PHP 7.0 or higher
## Usage
To run the utf8mb4 upgrade on your WordPress database, use the WP-CLI command:
```
wp upgrade_utf8mb4
```
The output will look like this:
```
Table wp_commentmeta current collation: utf8_general_ci
Table wp_commentmeta converted. New collation: utf8mb4_unicode_ci
Table wp_comments current collation: utf8_general_ci
Table wp_comments converted. New collation: utf8mb4_unicode_ci
Table wp_links current collation: utf8_general_ci
Table wp_links converted. New collation: utf8mb4_unicode_ci
Table wp_options current collation: utf8_general_ci
Table wp_options converted. New collation: utf8mb4_unicode_ci
Table wp_postmeta current collation: utf8_general_ci
Table wp_postmeta converted. New collation: utf8mb4_unicode_ci
Table wp_posts current collation: utf8_general_ci
Table wp_posts converted. New collation: utf8mb4_unicode_ci
Table wp_term_relationships current collation: utf8_general_ci
Table wp_term_relationships converted. New collation: utf8mb4_unicode_ci
Table wp_term_taxonomy current collation: utf8_general_ci
Table wp_term_taxonomy converted. New collation: utf8mb4_unicode_ci
Table wp_termmeta current collation: utf8_general_ci
Table wp_termmeta converted. New collation: utf8mb4_unicode_ci
Table wp_terms current collation: utf8_general_ci
Table wp_terms converted. New collation: utf8mb4_unicode_ci
Table wp_usermeta current collation: utf8_general_ci
Table wp_usermeta converted. New collation: utf8mb4_unicode_ci
Table wp_users current collation: utf8_general_ci
Table wp_users converted. New collation: utf8mb4_unicode_ci
Once this plugin has been run, you *do not* need to keep it active or installed on your site. Please get rid of the plugin by deleting it once you're done using it!
