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'];

}