![]() ![]() The indexes that will be resized are:Īnd from Multisite multisite Used to describe a WordPress installation with a network of multiple blogs, grouped by sites. For utf8mb4, that means 767 bytes / 4 bytes = 191 characters. ![]() Using a standard configuration, MySQL allows 767 bytes per index, which for utf8 means 767 bytes / 3 bytes = 255 characters. Utf8mb4 is 100% backwards compatible with utf8.ĭue to index size restrictions in MySQL, this does mean we need to re-create a handful of indexes to fit within MySQL’s rules. Unicode isn’t without its problems, but it’s the best option available. This greatly expands the language usability of WordPress, especially in countries that use Han character sets. In Unicode terms, utf8 can only store characters in the Basic Multilingual Plane, while utf8mb4 can store any Unicode character. The difference between utf8 and utf8mb4 is that the former can only store 3 byte characters, while the latter can store 4 byte characters. If you’re using mysqlnd, 5.0.9 or higher. Your MySQL client libraries are version 5.5.3 or higher.server is version 5.5.3 or higher (including all 10.x versions of MariaDB). A database is a structured collection of data where content, configuration and other options are stored. Your MySQL MySQL MySQL is a relational database management system.You’re currently using the utf8 character set.Your site will only upgrade when the following conditions are met: In WordPress 4.2, we’re upgrading tables to utf8mb4, when we can. ![]()
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