You can use the following macro to check the extension API version for compatibilities:
-#define ZEND_EXTENSION_API_NO_5_0_X 220040412
-#define ZEND_EXTENSION_API_NO_5_1_X 220051025
-#define ZEND_EXTENSION_API_NO_5_2_X 220060519
-#define ZEND_EXTENSION_API_NO_5_3_X 220090626
-#define ZEND_EXTENSION_API_NO_5_4_X 220100525
-#define ZEND_EXTENSION_API_NO_5_5_X 220121212
-#define ZEND_EXTENSION_API_NO_5_6_X 220131226
-#define ZEND_EXTENSION_API_NO_7_0_X 320151012
+#define ZEND_EXTENSION_API_NO_5_0_X 220040412
+#define ZEND_EXTENSION_API_NO_5_1_X 220051025
+#define ZEND_EXTENSION_API_NO_5_2_X 220060519
+#define ZEND_EXTENSION_API_NO_5_3_X 220090626
+#define ZEND_EXTENSION_API_NO_5_4_X 220100525
+#define ZEND_EXTENSION_API_NO_5_5_X 220121212
+#define ZEND_EXTENSION_API_NO_5_6_X 220131226
+#define ZEND_EXTENSION_API_NO_7_0_X 320151012
#if ZEND_EXTENSION_API_NO < ZEND_EXTENSION_API_NO_5_5_X
// do something for php versions lower than 5.5.x
*/
/* The first number is the engine version and the rest is the date (YYYYMMDD).
- * This way engine 2/3 API no. is always greater than engine 1 API no..
- */
+ * This way engine 2/3 API no. is always greater than engine 1 API no.. */
#define ZEND_EXTENSION_API_NO 320151012
typedef struct _zend_extension_version_info {