Apply upstream default charset change #976
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See WordPress/WordPress@08d1cf7 > `utf8mb4` is the complete UTF-8 implementation in MySQL, supporting the full range of Unicode characters by using up to 4 bytes per character. This includes characters outside the Basic Multilingual Plane, such as emoji and supplementary characters. `utf8mb4` ensures full compatibility with modern text content and diverse character sets. > > As of WordPress 4.2, on both new and existing installations, WordPress would automatically upgrade database tables to `utf8mb4` on compatible servers (MySQL 5.5.3 or later). However, the default `DB_CHARSET` value during setup was still set to `utf8` for compatibility with older MySQL versions. > > As of WordPress 6.5, the minimum required MySQL version is 5.5.5, so the default can be updated to `utf8mb4`. (We're currently on WordPress 6.8 here, but this default arguably makes sense to us much further back because we only support non-EOL MySQL versions.)
yosifkit
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Aug 12, 2025
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LGTM
To get the new default, users will need to remove wp-config.php from their WordPress volume so that the entrypoint will create a new one (but that will change your AUTH_KEY and other unique keys and salts if they aren't already passed via environment variables).
Or users can just set -e WORDPRESS_DB_CHARSET=utf8mb4 on their docker run.
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Indeed -- but also, WordPress will have already upgraded their databases in-place. 😂 🤘 |
docker-library-bot
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Changes: - docker-library/wordpress@bdaac32: Merge pull request docker-library/wordpress#976 from infosiftr/utf8mb4 - docker-library/wordpress@cb4dee6: Apply upstream default charset change
Muscraft
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Aug 19, 2025
Changes: - docker-library/wordpress@bdaac32: Merge pull request docker-library/wordpress#976 from infosiftr/utf8mb4 - docker-library/wordpress@cb4dee6: Apply upstream default charset change
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See WordPress/WordPress@08d1cf7
(We're currently on WordPress 6.8 here, but this default arguably makes sense to us much further back because we only support non-EOL MySQL versions.)