For notes on 1.32.x and older releases, see HISTORY.
=== Configuration changes for system administrators in 1.33 ===
+
==== New configuration ====
* $wgEnablePartialBlocks – This enables the Partial Blocks feature, which gives
accounts with block permissions the ability to block users, IPs, and IP ranges
argon2 to be used, by default, it will automatically choose the best available
algorithm depending on which version of PHP you have available. To use this,
you can set `$wgPasswordDefault = 'argon2';`.
+* $wgActorTableSchemaMigrationStage now defaults to reading the new schema.
+ update.php will back-populate the new database fields due to the changed
+ setting, which may take some time on large wikis. You can avoid downtime by
+ following a process like that described in T188327.
==== Removed configuration ====
* $wgTagStatisticsNewTable (T199334) — This temporary setting, added in
* (T213893) Added 'MaintenanceUpdateAddParams' hook
* (T219655) The MarkPatrolled hook has a new parameter for the tags
associated with this entry in the patrol log.
+* (T212472) Extensions can now specify platform abilities they require to work,
+ limited to shell access for now.
=== External library changes in 1.33 ===
+
==== New external libraries ====
* Added wikimedia/password-blacklist 0.1.4.
* Added guzzlehttp/guzzle 6.3.3.
* MessageBlobStore::getBlob(), deprecated in 1.27, has been removed.
Use ::getBlobs() instead.
* The .background-size() LESS mixin, deprecated in 1.27, has been removed.
+* ReadOnlyMode::clearCache() and ConfiguredReadOnlyMode::clearCache() have been
+ removed. Use MediaWikiTestCase::overrideMwServices() instead.
=== Deprecations in 1.33 ===
* The configuration option $wgUseESI has been deprecated, and is expected
* Block::isValid is deprecated, since it is no longer needed in core.
* Calling Maintenance::hasArg() as well as Maintenance::getArg() with no
parameter has been deprecated. Please pass the argument number 0.
+* ResourceLoaderContext::expandModuleNames has been deprecated.
+ Use ResourceLoader::expandModuleNames instead.
=== Other changes in 1.33 ===
* (T201747) Html::openElement() warns if given an element name with a space