msql_list_tables() lists the databases available on the specified link_identifier.
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.
Returns a result set which may be traversed with any function that fetches result sets, such as msql_fetch_array(). On failure, this function will return FALSE.