diff --git a/NEWS b/NEWS
index 6feb44d4b9b64..2b7021759fc48 100644
--- a/NEWS
+++ b/NEWS
@@ -78,6 +78,7 @@ PHP                                                                        NEWS
 
 - Hash:
   . Changed return type of hash_update() to true. (nielsdos)
+  . Added HashContext::__debugInfo(). (timwolla)
 
 - IMAP:
   . Moved to PECL. (Derick Rethans)
diff --git a/UPGRADING b/UPGRADING
index 7b979d549c861..a12c21bc0f153 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -230,6 +230,9 @@ PHP 8.4 UPGRADE NOTES
 - FPM:
   . Flushing headers without a body will now succeed. See GH-12785.
 
+- Hash:
+  . Added HashContext::__debugInfo().
+
 - Intl:
   . NumberFormatter::ROUND_HALFODD added to complement existing
     NumberFormatter::ROUND_HALFEVEN functionality.
diff --git a/ext/hash/hash.c b/ext/hash/hash.c
index 05b1de0c4c420..db831cef061ca 100644
--- a/ext/hash/hash.c
+++ b/ext/hash/hash.c
@@ -1560,6 +1560,21 @@ PHP_METHOD(HashContext, __unserialize)
 }
 /* }}} */
 
+ZEND_METHOD(HashContext, __debugInfo)
+{
+	zval *object = ZEND_THIS;
+	php_hashcontext_object *hash = php_hashcontext_from_object(Z_OBJ_P(object));
+
+	ZEND_PARSE_PARAMETERS_NONE();
+
+	zval tmp;
+
+	array_init(return_value);
+
+	ZVAL_STRING(&tmp, hash->ops->algo);
+	zend_hash_str_update(Z_ARR_P(return_value), "algo", strlen("algo"), &tmp);
+}
+
 /* {{{ PHP_MINIT_FUNCTION */
 PHP_MINIT_FUNCTION(hash)
 {
diff --git a/ext/hash/hash.stub.php b/ext/hash/hash.stub.php
index 6c45c63c462f7..fc88306237963 100644
--- a/ext/hash/hash.stub.php
+++ b/ext/hash/hash.stub.php
@@ -102,4 +102,6 @@ private function __construct() {}
     public function __serialize(): array {}
 
     public function __unserialize(array $data): void {}
+
+    public function __debugInfo(): array {}
 }
diff --git a/ext/hash/hash_arginfo.h b/ext/hash/hash_arginfo.h
index cc0050dff9714..d41664d9a1146 100644
--- a/ext/hash/hash_arginfo.h
+++ b/ext/hash/hash_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 9c0f01839a287d394b78b0dfd37b278a59d1b366 */
+ * Stub hash: df078e28c10c9af51b6c4e98c4ad4827e1f32bed */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_hash, 0, 2, IS_STRING, 0)
 	ZEND_ARG_TYPE_INFO(0, algo, IS_STRING, 0)
@@ -133,6 +133,8 @@ ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_class_HashContext___unserialize,
 	ZEND_ARG_TYPE_INFO(0, data, IS_ARRAY, 0)
 ZEND_END_ARG_INFO()
 
+#define arginfo_class_HashContext___debugInfo arginfo_hash_algos
+
 ZEND_FUNCTION(hash);
 ZEND_FUNCTION(hash_file);
 ZEND_FUNCTION(hash_hmac);
@@ -166,6 +168,7 @@ ZEND_FUNCTION(mhash);
 ZEND_METHOD(HashContext, __construct);
 ZEND_METHOD(HashContext, __serialize);
 ZEND_METHOD(HashContext, __unserialize);
+ZEND_METHOD(HashContext, __debugInfo);
 
 static const zend_function_entry ext_functions[] = {
 	ZEND_FE(hash, arginfo_hash)
@@ -205,6 +208,7 @@ static const zend_function_entry class_HashContext_methods[] = {
 	ZEND_ME(HashContext, __construct, arginfo_class_HashContext___construct, ZEND_ACC_PRIVATE)
 	ZEND_ME(HashContext, __serialize, arginfo_class_HashContext___serialize, ZEND_ACC_PUBLIC)
 	ZEND_ME(HashContext, __unserialize, arginfo_class_HashContext___unserialize, ZEND_ACC_PUBLIC)
+	ZEND_ME(HashContext, __debugInfo, arginfo_class_HashContext___debugInfo, ZEND_ACC_PUBLIC)
 	ZEND_FE_END
 };
 
diff --git a/ext/hash/tests/HashContext_debugInfo.phpt b/ext/hash/tests/HashContext_debugInfo.phpt
new file mode 100644
index 0000000000000..d68fbd08df407
--- /dev/null
+++ b/ext/hash/tests/HashContext_debugInfo.phpt
@@ -0,0 +1,18 @@
+--TEST--
+Hash: HashContext::__debugInfo()
+--FILE--
+<?php
+
+var_dump(hash_init('sha256'));
+var_dump(hash_init('sha3-512'));
+
+?>
+--EXPECTF--
+object(HashContext)#%d (1) {
+  ["algo"]=>
+  string(6) "sha256"
+}
+object(HashContext)#%d (1) {
+  ["algo"]=>
+  string(8) "sha3-512"
+}