- Add comment

diff --git a/Zend/zend_extensions.h b/Zend/zend_extensions.h
index 7a66c0fd5412dfda970717c2275f0811f4d4095a..7bd15e8f71b38f19f37e0c8239d193073cd5cce1 100644 (file)
--- a/Zend/zend_extensions.h
+++ b/Zend/zend_extensions.h
@@ -24,6 +24,9 @@
 
 #include "zend_compile.h"
 
+/* The first number is the engine version and the rest is the date.
+ * This way engine 2 API no. is always greater than engine 1 API no..
+ */
 #define ZEND_EXTENSION_API_NO  220040412
 
 typedef struct _zend_extension_version_info {