往common_invite表里更新相应的值，同时更新邀请注册的统计。

在731行附近

if($invite['uid']) {  
                                if($this->setting['inviteconfig']['inviteaddcredit']) {  
                                        updatemembercount($uid, array($this->setting['inviteconfig']['inviterewardcredit'] => $this->setting['
inviteconfig']['inviteaddcredit']));  
                                }  
                                if($this->setting['inviteconfig']['invitedaddcredit']) {  
                                        updatemembercount($invite['uid'], array($this->setting['inviteconfig']['inviterewardcredit'] => $this-
>setting['inviteconfig']['invitedaddcredit']));  
                                }  
                                require_once libfile('function/friend');  
                                friend_make($invite['uid'], $invite['username'], false);  
                                notification_add($invite['uid'], 'friend', 'invite_friend', array('actor' => '<a href="home.php?mod=space&uid=
'.$invite['uid'].'" target="_blank">'.$invite['username'].'</a>'), 1);  
 
                                space_merge($invite, 'field_home');  
                                if(!empty($invite['privacy']['feed']['invite'])) {  
                                        require_once libfile('function/feed');  
                                        $tite_data = array('username' => '<a href="home.php?mod=space&uid='.$_G['uid'].'">'.$_G['username'].'</a>');  
                                        feed_add('friend', 'feed_invite', $tite_data, '', array(), '', array(), array(), '', '', '', 0, 0, '', $i
nvite['uid'], $invite['username']);  
                                }  
                                if($invite['appid']) {  
                                        updatestat('appinvite');  
                                }  
                        }