Description
resource 
mssql_pconnect ( [string servername [, string username [, string password [, bool new_link]]]] )
 
     Returns: A positive MS SQL persistent link identifier on success,
     or FALSE on error.
    
     mssql_pconnect() acts very much like
     mssql_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,
     username and password.  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 (mssql_close() will not
     close links established by mssql_pconnect()).
    
 
     This type of links is therefore called 'persistent'.