phpwind和discuz中获取用户IP的方法

phpwind：

if ( $_SERVER [ ' HTTP_X_FORWARDED_FOR ' ]){
     $onlineip   =   $_SERVER [ ' HTTP_X_FORWARDED_FOR ' ];
     $c_agentip = 1 ;
}  elseif ( $_SERVER [ ' HTTP_CLIENT_IP ' ]){
     $onlineip   =   $_SERVER [ ' HTTP_CLIENT_IP ' ];
     $c_agentip = 1 ;
}  else {
     $onlineip   =   $_SERVER [ ' REMOTE_ADDR ' ];
     $c_agentip = 0 ;
}

disuz：

if ( getenv ( ' HTTP_CLIENT_IP ' )  &&   strcasecmp ( getenv ( ' HTTP_CLIENT_IP ' ) ,   ' unknown ' )) {
     $onlineip   =   getenv ( ' HTTP_CLIENT_IP ' );
}  elseif ( getenv ( ' HTTP_X_FORWARDED_FOR ' )  &&   strcasecmp ( getenv ( ' HTTP_X_FORWARDED_FOR ' ) ,   ' unknown ' )) {
     $onlineip   =   getenv ( ' HTTP_X_FORWARDED_FOR ' );
}  elseif ( getenv ( ' REMOTE_ADDR ' )  &&   strcasecmp ( getenv ( ' REMOTE_ADDR ' ) ,   ' unknown ' )) {
     $onlineip   =   getenv ( ' REMOTE_ADDR ' );
}  elseif ( isset ( $_SERVER [ ' REMOTE_ADDR ' ])  &&   $_SERVER [ ' REMOTE_ADDR ' ]  &&   strcasecmp ( $_SERVER [ ' REMOTE_ADDR ' ] ,   ' unknown ' )) {
     $onlineip   =   $_SERVER [ ' REMOTE_ADDR ' ];
}