Enhancement: restructured code - to loop 'earlier'

 * push error handling down to when it occurs
 * WIP, as I am unable to trigger false currently

lib/Doctrine/DBAL/Driver/Mysqli/MysqliConnection.php

@@ -186,11 +186,17 @@ class MysqliConnection implements Connection
                 );
             }
 
-            if (!mysqli_options($this->_conn, $option, $value)) {
+            if (@mysqli_options($this->_conn, $option, $value)) {
+                continue;
+            }
+
+            $msg  = sprintf($exceptionMsg, 'Failed to set', $option, $value);
+            $msg .= sprintf(', error: %s (%d)', mysqli_error($this->_conn), mysqli_errno($this->_conn));
+
             throw new MysqliException(
-                    sprintf($exceptionMsg, 'Failed to set', $option, $value)
+                $msg,
+                mysqli_errno($this->_conn)
             );
         }
     }
-    }
 }