PHP rookie question

[DaveEMG]

Alright, I can't find this... What's the server variable in PHP for the user's IP address? I just need to do an email signup form for a page, and I want to cap IP for CANSPAM compliance...

Sorry, total PHP rook here. I could do this in ASP in about 2 seconds, but can't find the magic in linux.

All help is appreciated...

 

[bubbles]

<?php
$ip = $_SERVER['REMOTE_ADDR'];
echo "Your IP address is as follows: " . $ip;
?>

That should do it.

 

[DaveEMG]

+ Rep. Worked perfectly. I swore I tried that, oh well. Ha ha thanks man.

 

[pig2cat]

+ Rep. Worked perfectly. I swore I tried that, oh well. Ha ha thanks man.

hehe, i had lots of problems with it too, if you put that in something like ip.php and include ip.php in another page it'll just show your server's ip :repuke: :error:

 

[Juicify]

hehe, i had lots of problems with it too, if you put that in something like ip.php and include ip.php in another page it'll just show your server's ip :repuke: :error:

If your server is fucked up yes.

 

[wesley]

To get the "real" IP, (not a proxy, etc.. use this)

$ip = 0;

if (isset($_SERVER['HTTP_CLIENT_IP']) && ip2long($_SERVER['HTTP_CLIENT_IP']) > 0) {
	$ip = $_SERVER['HTTP_CLIENT_IP'];
}		

if (!$ip && isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
	foreach (explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']) as $arr_ip) {
		if (ip2long($arr_ip) > 0) {
			$ip = $arr_ip;
		}
	}
}

if (!$ip && isset($_SERVER['HTTP_X_FORWARDED_FOR']) && ip2long($_SERVER['HTTP_X_FORWARDED']) > 0) {
	$ip = $_SERVER['HTTP_X_FORWARDED'];
} else if (!$ip && isset($_SERVER['HTTP_FORWARDED_FOR']) && ip2long($_SERVER['HTTP_FORWARDED_FOR']) > 0) {
	$ip = $_SERVER['HTTP_FORWARDED_FOR'];
} else if (!$ip && isset($_SERVER['HTTP_FORWARDED']) && ip2long($_SERVER['HTTP_FORWARDED']) > 0) {
	$ip = $_SERVER['HTTP_FORWARDED'];
} else if (!$ip) {
	$ip = $_SERVER['REMOTE_ADDR'];
}

 

[cashflowrusty]

Wesley beat me with a much more detailed answer. Thanks!

 

[productionhead]

wesley what type of proxies are u referring to? obviosuly this cant bypass socks4/5 and http proxies

 

[tobsn]

one thing:

ip2long is signed - use

$longip = sprintf( "%u", ip2long( $ip ) );

btw. same with crc32 (if you have to use it someday):

$hash = sprintf( "%u", crc32( $string ) );