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338

answers:

1
Q: 

REMOTE_ADDR and IPv6 in PHP

Is it safe to assume that $_SERVER['REMOTE_ADDR'] always returns a IPv4 address?

Thanks!

+3  A: 

The REMOTE_ADDR key is set by the web server, not PHP. If the web server listens on v6 and the user connects that way, it'll be a v6 address

Michael Mrozek  2010-04-12 02:58:49
+1, Thanks! I'm gonna try to figure out how I can convert an IPv6 address to a number.
Alix Axel  2010-04-12 03:06:55
http://php.net/manual/en/function.inet-pton.php will convert v4 and v6 "string" addresses to their packed representation.
Marc B  2010-04-12 21:54:06

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