diff --git a/NEWS b/NEWS
index 1656b8bba2683..dc28d6abdc3f7 100644
--- a/NEWS
+++ b/NEWS
@@ -12,6 +12,10 @@ PHP                                                                        NEWS
   . Passing E_USER_ERROR to trigger_error() is now deprecated. (Girgias)
   . Fixed bug GH-15292 (Dynamic AVX detection is broken for MSVC). (nielsdos)
 
+- Curl:
+  . Added constants CURL_HTTP_VERSION_3 (libcurl 7.66) and CURL_HTTP_VERSION_3ONLY
+    (libcurl 7.88) as options for CURLOPT_HTTP_VERSION (Ayesh Karunaratne)
+
 - Date:
   . Constants SUNFUNCS_RET_TIMESTAMP, SUNFUNCS_RET_STRING, and SUNFUNCS_RET_DOUBLE
     are now deprecated. (Jorg Sowa)
diff --git a/UPGRADING b/UPGRADING
index 544a25c6fbeb8..29dc2d2b171ef 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -244,6 +244,8 @@ PHP 8.4 UPGRADE NOTES
   . curl_version() returns an additional feature_list value, which is an
     associative array of all known Curl features, and whether they are
     supported (true) or not (false).
+  . Added CURL_HTTP_VERSION_3 and CURL_HTTP_VERSION_3ONLY constants (available
+    since libcurl 7.66 and 7.88) as available options for CURLOPT_HTTP_VERSION.
 
 - Date:
   . Added static methods
@@ -881,6 +883,10 @@ PHP 8.4 UPGRADE NOTES
   . PHP_OUTPUT_HANDLER_PROCESSED.
   . PHP_SBINDIR.
 
+- Curl:
+  . CURL_HTTP_VERSION_3.
+  . CURL_HTTP_VERSION_3ONLY.
+
 - Intl:
   . The IntlDateFormatter class exposes now the new PATTERN constant
     reflecting udat api's UDAT_PATTERN.
diff --git a/ext/curl/curl.stub.php b/ext/curl/curl.stub.php
index 5709a404afe97..0adfb17c4d3f3 100644
--- a/ext/curl/curl.stub.php
+++ b/ext/curl/curl.stub.php
@@ -3102,6 +3102,11 @@
  * @cvalue CURLINFO_RETRY_AFTER
  */
 const CURLINFO_RETRY_AFTER = UNKNOWN;
+/**
+ * @var int
+ * @cvalue CURL_HTTP_VERSION_3
+ */
+const CURL_HTTP_VERSION_3  = UNKNOWN;
 #endif
 
 #if LIBCURL_VERSION_NUM >= 0x074300 /* Available since 7.67.0 */
@@ -3547,6 +3552,14 @@
 const CURLOPT_QUICK_EXIT = UNKNOWN;
 #endif
 
+#if LIBCURL_VERSION_NUM >= 0x075800 /* Available since 7.88.0 */
+/**
+ * @var int
+ * @cvalue CURL_HTTP_VERSION_3ONLY
+ */
+const CURL_HTTP_VERSION_3ONLY  = UNKNOWN;
+#endif
+
 /**
  * @var int
  * @cvalue CURLOPT_SAFE_UPLOAD
diff --git a/ext/curl/curl_arginfo.h b/ext/curl/curl_arginfo.h
index 0eee34bfd3178..044763d57df0f 100644
--- a/ext/curl/curl_arginfo.h
+++ b/ext/curl/curl_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 92f4985790d0dad4216be837571e41c86711b6f8 */
+ * Stub hash: b5a3bd62bcb62b2e7e4aacfcd4621cc632be1564 */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_curl_close, 0, 1, IS_VOID, 0)
 	ZEND_ARG_OBJ_INFO(0, handle, CurlHandle, 0)
@@ -848,6 +848,9 @@ static void register_curl_symbols(int module_number)
 #if LIBCURL_VERSION_NUM >= 0x074200 /* Available since 7.66.0 */
 	REGISTER_LONG_CONSTANT("CURLINFO_RETRY_AFTER", CURLINFO_RETRY_AFTER, CONST_PERSISTENT);
 #endif
+#if LIBCURL_VERSION_NUM >= 0x074200 /* Available since 7.66.0 */
+	REGISTER_LONG_CONSTANT("CURL_HTTP_VERSION_3", CURL_HTTP_VERSION_3, CONST_PERSISTENT);
+#endif
 #if LIBCURL_VERSION_NUM >= 0x074300 /* Available since 7.67.0 */
 	REGISTER_LONG_CONSTANT("CURLMOPT_MAX_CONCURRENT_STREAMS", CURLMOPT_MAX_CONCURRENT_STREAMS, CONST_PERSISTENT);
 #endif
@@ -1081,6 +1084,9 @@ static void register_curl_symbols(int module_number)
 #endif
 #if LIBCURL_VERSION_NUM >= 0x075700 /* Available since 7.87.0 */
 	REGISTER_LONG_CONSTANT("CURLOPT_QUICK_EXIT", CURLOPT_QUICK_EXIT, CONST_PERSISTENT);
+#endif
+#if LIBCURL_VERSION_NUM >= 0x075800 /* Available since 7.88.0 */
+	REGISTER_LONG_CONSTANT("CURL_HTTP_VERSION_3ONLY", CURL_HTTP_VERSION_3ONLY, CONST_PERSISTENT);
 #endif
 	REGISTER_LONG_CONSTANT("CURLOPT_SAFE_UPLOAD", CURLOPT_SAFE_UPLOAD, CONST_PERSISTENT);
 }