I need to check the etag of a webpage everytime, so that I can check did the user has visitor the page. However, I have some information will need to pass in by url variables, and there is a problem now. Once the url vars are different, (pixel.php?a=1/pixel.php?a=2/.....) the browser will think that they are actually different file, and will not request with "If-None-Match" header, is there anyway to tell the broswer that they are actualy the same?
Thanks~
some headers and cache questions
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Re: some headers and cache questions
You could try using post instead of get but I don't know if this is feasible under your circumstances. Another solution, although rather ugly, would be to transmit the information through an iframe.
Re: some headers and cache questions
Sorry if I misunderstodd you, but it sounded like you could use: parse_url — Parse a URL and return its components easier get what you want or strip of things you dont want.