msql_close() closes the non-persistent connection to the mSQL server that's associated with the specified link identifier.
Using msql_close() isn't usually necessary, as non-persistent open links are automatically closed at the end of the script's execution. See also freeing resources.
The mSQL connection. If not specified, the last link opened by msql_connect() is assumed. If no such link is found, the function will try to establish a link as if msql_connect() was called, and use it.