The mysqli_real_query() function is used to execute
only a query against the database represented by the link
whose result can then be retrieved or stored using the
mysqli_store_result() or mysqli_use_result()
functions.
Замечание:
In order to determine if a given query should return a result set or not,
see mysqli_field_count().
Возвращаемые значения
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.