(PHP 4 >= 4.0.5, PHP 5 <= 5.0.4)
Set channel mode flags for user
( resource connection, string channel, string mode_spec, string nick )
Set channel mode flags for channel on
server connected to by connection. Mode flags
are passed in mode_spec and are applied to
the user specified by nick.
Mode flags are set or cleared by specifying a mode character and
prepending it with a plus or minus character,
respectively. E.g. operator mode is granted by '+o' and revoked
by '-o', as passed as mode_spec.