diff --git a/thirdparty/creole/drivers/mssql/MSSQLResultSet.php b/thirdparty/creole/drivers/mssql/MSSQLResultSet.php
index b66008179..f9c2f1330 100644
--- a/thirdparty/creole/drivers/mssql/MSSQLResultSet.php
+++ b/thirdparty/creole/drivers/mssql/MSSQLResultSet.php
@@ -171,10 +171,12 @@ class MSSQLResultSet extends ResultSetCommon implements ResultSet
     /**
      * @see ResultSet::close()
      */
-    function close()
+    public function close()
     {
         if (extension_loaded('sqlsrv')) {
-            $ret = @sqlsrv_free_stmt($this->result);
+            if (is_resource($this->result)) {
+                $ret = @sqlsrv_free_stmt($this->result);
+            }
         } else {
             $ret = @mssql_free_result($this->result);
         }
diff --git a/thirdparty/creole/drivers/mysqli/MySQLiResultSet.php b/thirdparty/creole/drivers/mysqli/MySQLiResultSet.php
index 4a2f104c6..cb8dd29b8 100644
--- a/thirdparty/creole/drivers/mysqli/MySQLiResultSet.php
+++ b/thirdparty/creole/drivers/mysqli/MySQLiResultSet.php
@@ -98,7 +98,12 @@ class MySQLiResultSet extends ResultSetCommon implements ResultSet {
      */
     public function close()
     {
-        if ($this->result instanceof mysqli_result) {
+        /**
+         * This is not a definitive solution because there are several behaviors 
+         * reported to use the "mysqli_free_result()" function, see 
+         * https://bugs.php.net/bug.php?id=63486
+         */
+        if ($this->result instanceof mysqli_result && isset($this->result->lengths)) {
             @mysqli_free_result($this->result);
         }
         $this->fields = array();