Use zend_string API functions

Author: Girgias

Zend/zend_operators.c

@@ -2528,13 +2528,10 @@ static bool ZEND_FASTCALL increment_string(zval *str) /* {{{ */
 
 	if (UNEXPECTED(!zend_string_only_has_ascii_alphanumeric(Z_STR_P(str)))) {
 		zend_string *zstr = Z_STR_P(str);
-		GC_TRY_ADDREF(zstr);
+		zend_string_addref(zstr);
 		zend_error(E_DEPRECATED, "Increment on non-alphanumeric string is deprecated");
 		if (EG(exception)) {
-			GC_TRY_DELREF(zstr);
-			if (!GC_REFCOUNT(zstr)) {
-				efree(zstr);
-			}
+			zend_string_release(zstr);
 			return false;
 		}
 		zval_ptr_dtor(str);
@@ -2740,13 +2737,10 @@ ZEND_API zend_result ZEND_FASTCALL decrement_function(zval *op1) /* {{{ */
 				default: {
 					/* Error handler can unset the variable */
 					zend_string *zstr = Z_STR_P(op1);
-					GC_TRY_ADDREF(zstr);
+					zend_string_addref(zstr);
 					zend_error(E_DEPRECATED, "Decrement on non-numeric string has no effect and is deprecated");
 					if (EG(exception)) {
-						GC_TRY_DELREF(zstr);
-						if (!GC_REFCOUNT(zstr)) {
-							efree(zstr);
-						}
+						zend_string_release(zstr);
 						return FAILURE;
 					}
 					zval_ptr_dtor(op1);