From 4b23c4b5bd3bb5f7a4185e496d62a0a40391c402 Mon Sep 17 00:00:00 2001
From: Maksim Spirkov <63721828+max-s-lab@users.noreply.github.com>
Date: Mon, 6 Oct 2025 14:35:37 +0400
Subject: [PATCH] Fix #20569: Fix `@param` annotation for `$default` in
 `HeaderCollection::get`

---
 framework/CHANGELOG.md             | 1 +
 framework/web/HeaderCollection.php | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index c0679e2c93..d273bd3d8c 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -43,6 +43,7 @@ Yii Framework 2 Change Log
 - Enh #19526: Add the `convertIniSizeToBytes` method to `BaseStringHelper` (max-s-lab)
 - Bug #20570: Fix `@var` annotation for `UrlManager::$cache` (max-s-lab)
 - Bug #20571: Fix `@var` annotation for `yii\web\Response::$stream` (max-s-lab)
+- Bug #20569: Fix `@param` annotation for `$default` in `HeaderCollection::get` (max-s-lab)
 - Bug #20576: Fix `@var` annotation for `StringValidator::$length` (max-s-lab)
 
 
diff --git a/framework/web/HeaderCollection.php b/framework/web/HeaderCollection.php
index 64cae459b1..57ddd6dfe2 100644
--- a/framework/web/HeaderCollection.php
+++ b/framework/web/HeaderCollection.php
@@ -67,7 +67,7 @@ class HeaderCollection extends BaseObject implements \IteratorAggregate, \ArrayA
     /**
      * Returns the named header(s).
      * @param string $name the name of the header to return
-     * @param mixed $default the value to return in case the named header does not exist
+     * @param string|array|null $default the value to return in case the named header does not exist
      * @param bool $first whether to only return the first header of the specified name.
      * If false, all headers of the specified name will be returned.
      * @return string|array|null the named header(s). If `$first` is true, a string will be returned;