fix build on PHP 8.6+ (#580)

* fix session on PHP 8.6+
reference:
php/php-src@71096cd

* fix offsetof on PHP 8.6+
reference:
php/php-src@7114314

* Fix zval_dtor on PHP 8.6+
reference:
php/php-src@df8ce6d

Author: pavetheway91

php_memcached.c

@@ -195,7 +195,7 @@ typedef struct {
 } php_memc_result_callback_ctx_t;
 
 static inline php_memc_object_t *php_memc_fetch_object(zend_object *obj) {
-	return (php_memc_object_t *)((char *)obj - XtOffsetOf(php_memc_object_t, zo));
+	return (php_memc_object_t *)((char *)obj - offsetof(php_memc_object_t, zo));
 }
 #define Z_MEMC_OBJ_P(zv) php_memc_fetch_object(Z_OBJ_P(zv));
 
@@ -280,7 +280,7 @@ typedef struct {
 } php_memc_server_t;
 
 static inline php_memc_server_t *php_memc_server_fetch_object(zend_object *obj) {
-	return (php_memc_server_t *)((char *)obj - XtOffsetOf(php_memc_server_t, zo));
+	return (php_memc_server_t *)((char *)obj - offsetof(php_memc_server_t, zo));
 }
 #define Z_MEMC_SERVER_P(zv) php_memc_server_fetch_object(Z_OBJ_P(zv))
 
@@ -1689,7 +1689,7 @@ static void php_memc_getMulti_impl(INTERNAL_FUNCTION_PARAMETERS, zend_bool by_ke
 	}
 
 	if (!retval || EG(exception)) {
-		zval_dtor(return_value);
+		zval_ptr_dtor_nogc(return_value);
 		RETURN_FROM_GET;
 	}
 }
@@ -1892,7 +1892,7 @@ PHP_METHOD(Memcached, fetchAll)
 	status = php_memc_result_apply(intern, s_fetch_all_apply, 0, return_value);
 
 	if (s_memc_status_handle_result_code(intern, status) == FAILURE) {
-		zval_dtor(return_value);
+		zval_ptr_dtor_nogc(return_value);
 		RETURN_FALSE;
 	}
 }
@@ -2935,7 +2935,7 @@ PHP_METHOD(Memcached, getVersion)
 	array_init(return_value);
 	status = memcached_server_cursor(intern->memc, callbacks, return_value, 1);
 	if (s_memc_status_handle_result_code(intern, status) == FAILURE) {
-		zval_dtor(return_value);
+		zval_ptr_dtor_nogc(return_value);
 		RETURN_FALSE;
 	}
 }
@@ -2977,7 +2977,7 @@ PHP_METHOD(Memcached, getAllKeys)
 	 */
 	if (rc != MEMCACHED_CLIENT_ERROR && rc != MEMCACHED_SERVER_ERROR
 	    && s_memc_status_handle_result_code(intern, rc) == FAILURE) {
-		zval_dtor(return_value);
+		zval_ptr_dtor_nogc(return_value);
 		RETURN_FALSE;
 	}
 }
@@ -4404,7 +4404,7 @@ PHP_MINIT_FUNCTION(memcached)
 	zend_class_entry ce;
 
 	memcpy(&memcached_object_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
-	memcached_object_handlers.offset    = XtOffsetOf(php_memc_object_t, zo);
+	memcached_object_handlers.offset    = offsetof(php_memc_object_t, zo);
 	memcached_object_handlers.clone_obj = NULL;
 	memcached_object_handlers.free_obj  = php_memc_object_free_storage;
 
@@ -4415,7 +4415,7 @@ PHP_MINIT_FUNCTION(memcached)
 
 #ifdef HAVE_MEMCACHED_PROTOCOL
 	memcpy(&memcached_server_object_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
-	memcached_server_object_handlers.offset = XtOffsetOf(php_memc_server_t, zo);
+	memcached_server_object_handlers.offset = offsetof(php_memc_server_t, zo);
 	memcached_server_object_handlers.clone_obj = NULL;
 	memcached_server_object_handlers.free_obj = php_memc_server_free_storage;
 

php_memcached_session.c

@@ -324,15 +324,21 @@ PS_OPEN_FUNC(memcached)
 
 	memcached_server_list_st servers;
 
+#if PHP_VERSION_ID >= 80600
+    const char *save_path_str = ZSTR_VAL(save_path);
+#else
+    const char *save_path_str = save_path;
+#endif
+
 	// Fail on incompatible PERSISTENT identifier (removed in php-memcached 3.0)
-	if (strstr(save_path, "PERSISTENT=")) {
+	if (strstr(save_path_str, "PERSISTENT=")) {
 		php_error_docref(NULL, E_WARNING, "failed to parse session.save_path: PERSISTENT is replaced by memcached.sess_persistent = On");
 		PS_SET_MOD_DATA(NULL);
 		return FAILURE;
 	}
 
 	// First parse servers
-	servers = memcached_servers_parse(save_path);
+	servers = memcached_servers_parse(save_path_str);
 
 	if (!servers) {
 		php_error_docref(NULL, E_WARNING, "failed to parse session.save_path");
@@ -343,7 +349,7 @@ PS_OPEN_FUNC(memcached)
 	if (MEMC_SESS_INI(persistent_enabled)) {
 		zend_resource *le_p;
 
-		plist_key_len = spprintf(&plist_key, 0, "memc-session:%s", save_path);
+		plist_key_len = spprintf(&plist_key, 0, "memc-session:%s", save_path_str);
 
 		if ((le_p = zend_hash_str_find_ptr(&EG(persistent_list), plist_key, plist_key_len)) != NULL) {
 			if (le_p->type == s_memc_sess_list_entry()) {