获取访问者的 客户端IP地址

/**

* 获取访问者的 客户端的ip地址

*/

echo $ip = getIP();

function getIP() {

if ($_SERVER['HTTP_X_FORWARDED_FOR']){

$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];

}elseif ($_SERVER['HTTP_CLIENT_IP']){

$ip = $_SERVER['HTTP_CLIENT_IP'];

}elseif ($_SERVER['REMOTE_ADDR']){

$ip = $_SERVER['REMOTE_ADDR'];

}elseif (getenv('HTTP_X_FORWARDED_FOR')){

$ip = getenv('HTTP_X_FORWARDED_FOR');

}elseif (getenv('HTTP_CLIENT_IP')){

$ip = getenv('HTTP_CLIENT_IP');

}elseif (getenv('REMOTE_ADDR')){

$ip = getenv('REMOTE_ADDR');

}else{

$ip = '';

}

return $ip;

}