on 10/3/2011 5:17 PM Tedd Sperling said the following:
PUNYCODE is the ULR for IDN (Internationalized Domain Names). PHP doesn't have to deal with it any more/less than any other URL.
I understand that, but I'm asking something like: if you type in •.com into your browser, what's getting passed to the server behind the scenes? Are we dealing with $_SERVER['HOST_NAME'] being the unicode value? If your browser punycodes that, how do you make sure that you are getting the same thing? So what comes through in the HTTP header, what does the server see, what does the PHP interpreter see, and how do you match up http:// www.3Φ.com with http:// www.xn--3-6mb.com?
Obviously I'm not talking about dealing (necessarily) with user input or display -- those are different things. I don't run a server that hosts an IDN domain name, so I don't even know what ends up in the logs, and what PHP sees from the Hostname: HTTP field, and ... ?
(Oh cool, Verizon's mail server scanned this initially, found the IDN URL in the message, and determined this to be spam. Neat! Therefore, I have added spaces above to thwart this behavior.)
tedd
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