Returns a positive mSQL persistent link identifier on
success, or FALSE on
error.
msql_pconnect() acts very much
like msql_connect() with two major
differences.
First, when connecting, the function would first try to
find a (persistent) link that's already open with the same
host. If one is found, an identifier for it will be returned
instead of opening a new connection.
Second, the connection to the SQL server will not be
closed when the execution of the script ends. Instead, the
link will remain open for future use (msql_close() will not close links
established by msql_pconnect()).
This type of links is therefore called 'persistent'.