I poked around online the other day looking for some PHP code that would do things like tell me whether or not a user was using IPv6. I found some code that did the job after a bit of Googling.

The code was pretty ugly, so I fixed it up. While I was at it, I updated it to optimize it a bit, as well as use conventions found in newer versions of PHP, such as the $_SERVER[] variable array, etc. Further, since I only needed to detect whether or not a user was using IPv6, I was able to cut the code that did IPv6 address compression and uncompression.

I read the IPv6 Howto over on the OpenWRT wiki. It’s got a lot of superfluous info in it, none of which relates to most US-based broadband users. Huh? Most US broadband customers have connections that are dynamic in nature, and do not use PPPoX or PPTP, but rather use DHCP on a standard Ethernet connection.