(PHP3 >= 3.0.13, PHP4 >= 4.0b4)
mcal_popen -- Opens up a persistant MCAL connection
Description
int mcal_popen (string calendar, string username, string password, int options)
     Returns an MCAL stream on success, false on error.
    
     mcal_popen() opens up an MCAL connection to the
     specified calendar store. If the optional
     options is specified, passes the
     options to that mailbox also. The streams
     internal event structure is also initialized upon connection.