(PHP 4 >= 4.3.3, PHP 5 <= 5.0.5)
ircg_who — Queries server for WHO information
ircg_who() will request a list of users whose nickname is matching the given mask .
The answer is sent to the output defined by ircg_set_file() or ircg_set_current().
A connection resource handle returned by ircg_pconnect().
A mask for the nickname.
The optional parameter ops_only will shrink the list to server operators only.
如果成功则返回 TRUE，失败则返回 FALSE。