Close GH-10217: Use strlen() for determining the class_name length

Closes GH-10231.

Author: Dennis Buteyn

NEWS

@@ -18,6 +18,8 @@ PHP                                                                        NEWS
   . Added shadow stack support for fibers. (Chen Hu)
   . Fix bug GH-9965 (Fix accidental caching of default arguments with side
     effects). (ilutov)
+  . Implement GH-10217 (Use strlen() for determining the class_name length).
+    (Dennis Buteyn)
 
 - Fileinfo:
   . Upgrade bundled libmagic to 5.43. (Anatol)

Zend/zend_API.h

@@ -267,7 +267,7 @@ typedef struct _zend_fcall_info_cache {
 #endif
 
 #define INIT_CLASS_ENTRY(class_container, class_name, functions) \
-	INIT_CLASS_ENTRY_EX(class_container, class_name, sizeof(class_name)-1, functions)
+	INIT_CLASS_ENTRY_EX(class_container, class_name, strlen(class_name), functions)
 
 #define INIT_CLASS_ENTRY_EX(class_container, class_name, class_name_len, functions) \
 	{															\