From b29a96da645aaeed12c631eb151abe27705396a6 Mon Sep 17 00:00:00 2001
From: Callum Bridgford-Whittick <callumbw@gmail.com>
Date: Fri, 7 Aug 2026 18:05:23 +0100
Subject: [PATCH] I18N: Correct the case of the MO class in a
 WP_Locale_Switcher docblock.

The `@global` tag for `$l10n` in `WP_Locale_Switcher::load_translations()`
documented the array as `Mo[]`. The class is `MO`, defined in
`wp-includes/pomo/mo.php`; no class named `Mo` exists. Every other `@global`
annotation for `$l10n` in core already uses `MO[]`, so this was the sole
outlier. The description is also clarified to note that the array is keyed by
text domain.

This empties the `class.nameCase` PHPStan baseline, so the file is removed
along with its `includes` entry in `phpstan.neon.dist`.

Props CallumBW95.
See #65817.
---
 phpstan.neon.dist                            |  1 -
 src/wp-includes/class-wp-locale-switcher.php |  2 +-
 tests/phpstan/baselines/class.nameCase.neon  | 25 --------------------
 3 files changed, 1 insertion(+), 27 deletions(-)
 delete mode 100644 tests/phpstan/baselines/class.nameCase.neon

diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 3dcf0f6c2c0de..3258c2d9c73e8 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -39,7 +39,6 @@ includes:
 	- tests/phpstan/baselines/booleanOr.alwaysTrue.neon
 	- tests/phpstan/baselines/booleanOr.rightAlwaysTrue.neon
 	- tests/phpstan/baselines/catch.neverThrown.neon
-	- tests/phpstan/baselines/class.nameCase.neon
 	- tests/phpstan/baselines/class.notFound.neon
 	- tests/phpstan/baselines/deadCode.unreachable.neon
 	- tests/phpstan/baselines/empty.offset.neon
diff --git a/src/wp-includes/class-wp-locale-switcher.php b/src/wp-includes/class-wp-locale-switcher.php
index 55edef3c9c055..05fbc07a903df 100644
--- a/src/wp-includes/class-wp-locale-switcher.php
+++ b/src/wp-includes/class-wp-locale-switcher.php
@@ -238,7 +238,7 @@ public function filter_locale( $locale ) {
 	 *
 	 * @since 4.7.0
 	 *
-	 * @global Mo[] $l10n An array of all currently loaded text domains.
+	 * @global MO[] $l10n An array of all currently loaded text domains, keyed by text domain.
 	 *
 	 * @param string $locale The locale to load translations for.
 	 */
diff --git a/tests/phpstan/baselines/class.nameCase.neon b/tests/phpstan/baselines/class.nameCase.neon
deleted file mode 100644
index dd88c5b677aa8..0000000000000
--- a/tests/phpstan/baselines/class.nameCase.neon
+++ /dev/null
@@ -1,25 +0,0 @@
-# PHPStan baseline for the `class.nameCase` errors in WordPress core.
-#
-# https://phpstan.org/error-identifiers/class.nameCase
-#
-# Each entry is scoped to a single file and carries an exact occurrence count,
-# so that a new instance is reported as a new error rather than being absorbed
-# silently. Fixing an occurrence therefore means decrementing or removing its
-# entry here as part of the same change.
-#
-# The goal is to empty this file and delete it, along with the `includes` entry
-# for it in phpstan.neon.dist.
-#
-# Generated by `composer phpstan:baselines`. Do not edit by hand; regenerate with
-#
-#     composer phpstan:baselines -- --identifier=class.nameCase
-#
-# which reruns the analysis with this file suppressed so the errors surface again.
-
-parameters:
-	ignoreErrors:
-		-
-			message: '#^Class MO referenced with incorrect case\: Mo\.$#'
-			identifier: class.nameCase
-			count: 1
-			path: ../../../src/wp-includes/class-wp-locale-switcher.php