Re: [PHP] $_SERVER[REMOTE_ADDR]

[Jason Sheets]

It isn't always possible to get the visitor's real IP address, if the 
user's traffic is proxied the REMOTE_ADDR will be the proxy IP address, 
some proxies set the forwarded for header but for security and privacy 
some do not.

If you are not being directed through a proxy REMOTE_ADDR does show the 
real user IP address.

Also be aware dns lookups are expensive, rather than resolving their ip 
address when they visit you should consider resolving them when you need 
them in host format.

Jason

John wrote:

Makes me think...... what exactly the $_SERVER[REMOTE_ADDR] is doing....????

Cause it does not really show the actual IP address instead IP address
within its range....
e.g. 66.87.25.122
output 66.87.25.2
any idea how to get their actual IP add and if possible the name of their
computer....
Also, is it also possible to get or trace the IP add?

many thanks,
John


 



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