When using PHP as a module in apache, and connecting to mSQL using local domain sockets. If a connection is made using msql_pconnect() and the mSQL database goes away, when it returns all subsiquent mSQL operations will fail when using this persistent connection. The only way to fix this situation is to restart apache. The problem is that upon calling msql_pconnect() after mSQL has been restarted the existing (now invalid) handle is returned. Either support should be added to detect the termination of the connection (if this is possible) or an msql_pclose() function should be added so that a persistent connection can be explicitely closed when it becomes invalid.