mysql_drop_db() attempts to drop (remove) an entire database from the server associated with the specified link identifier.
Returns TRUE on success or FALSE on failure.
For downward compatibility mysql_dropdb() can also be used. This is deprecated, however.
Note: The function mysql_drop_db() is deprecated. It is preferable to use mysql_query() to issue a SQL DROP DATABASE statement instead.
This function will not be available if the MySQL extension was built against a MySQL 4.x client library