php to obtain the client ip address

php tutorial to obtain the client ip address This tutorial provides several code to obtain the ip address, each has its own advantages, users get ip is the use of global variables php to achieve, the following to see if you are looking for.
* /
// The easiest way

$ ip = $ _server ["remote_addr"];
Echo $ ip; / / Most useful to obtain the user ip address code

function get_real_ip () {
$ ip = false;
if (! empty ($ _ server ["http_client_ip"]))
{
$ ip = $ _server ["http_client_ip"];
}
if (! empty ($ _ server ['http_x_forwarded_for']))
{
$ ips tutorial = explode (",", $ _server ['http_x_forwarded_for']);
if ($ ip) {
array_unshift ($ ips, $ ip);
$ ip = false;
}
for ($ i = 0; $ i <count ($ ips); $ i ++)
{
if (! eregi ("^ (10 | 172.16 | 192.168).", $ ips [$ i]))
{
$ ip = $ ips [$ i];
break;
}
}
}
return ($ ip? $ ip: $ _server ['remote_addr']);
}
echo get_real_ip (); / / Get ip address and port number

$ ip = $ _ server ["remote_addr"];
$ port = $ _server ['remote_port'];
Echo $ ip. $ port; / / A little meaning

if (getenv ('http_client_ip'))
{
$ onlineip = getenv ('http_client_ip');
}
elseif (getenv ('http_x_forwarded_for'))
{
$ onlineip = getenv ('http_x_forwarded_for');
}
elseif (getenv ('remote_addr'))
{
$ onlineip = getenv ('remote_addr');
}
else
{
$ onlineip = $ http_server_vars ['remote_addr'];
}
echo $ onlineip;
echo "
"; / / Use qq interface

function get_ip_place () {
$ ip = file_get_contents ("http://fw.qq.com/ipaddress");
$ ip = str_replace ('', '', $ ip);
$ ip2 = explode ("(", $ ip);
$ a = substr ($ ip2 [1], 0, -2);
$ b = explode (",", $ a);
return $ b;
}
$ ip = get_ip_place ();
print_r ($ ip);