[SOLVED] getting the users ip address?

[shadiadiph]

Hi how can i get a users ip address who is viewing one of my webpages?

[gevans]

$_SERVER['REMOTE_ADDR']

[printf]

That will not always be filled or it will not always contain the actually client ip. Such as when a client is using a proxy or they are using many pass thru proxies. If you want to be 100% sure, then you need to check...

 

REMOTE_ADDR (assign 2 variables [ip, op])

HTTP_CLIENT_IP (if this is set, assign op to this value)

HTTP_X_FORWARDED_FOR (else if this is set, you will have to loop each ip, removing network masked ip(s) and then assigning op this value)

HTTP_FROM (else if this is set, assign op to this value)

 

in that order

 

At the end of that, if $ip == $op, then client is using a unique ip, else if $ip != $op, client is using proxy gateway ip, (ip is shared)

 

It important to do that when you create a (BLOCKING BY IP) so you only block that client, not the proxy because it is shared by thousands of users, (AOL,NETZero,most mobile phones,...)

[shadiadiph]

mm sorry guys you have both lost me there i half understand is there anywhere i can read up on this on the net?

Unfortunately the country I live in English books are hard to find

[Q695]

You could also pull all the variables on the server by using:

echo "<b>_SERVER</b><br />";
foreach($_SERVER as $clave=>$valor)
{
echo $clave." = ".$valor."<br />";
}

this also works very well for debugging, so you can see what variables are being sent by changing the variable type.

[Philip]

@OP:

 

Typically, using $_SERVER['REMOTE_ADDR'] will give you the correct IP.

 

<?php
echo $_SERVER['REMOTE_ADDR'];
?>

 

That'd show your IP when you visit. Printf was talking about how it can be spoofed, hidden, etc.

[shadiadiph]

thank you