my_ulonglong mysql_num_rows(MYSQL_RES * );
MYSQL_RES - a result set identifier returned by mysql_store_result() or mysql_use_result().
MYSQL_RES
Returns number of rows in a result set.
The behavior of mysql_num_rows() depends on whether buffered or unbuffered result sets are being used. For unbuffered result sets, mysql_num_rows() will not return the correbct number of rows until all the rows in the result have been retrieved.
mysql_num_rows()
mysql_affected_rows()
mysql_use_result()
mysql_store_result()