Checking if Cookie was blocked

[heramb22]

How can I check if a cookie was blocked or accepted? The setcookie() function returns true if it was run, but does not help in telling whether the cookie was set. My problem is that my site continues to check for the cookie, if it is absent it tries to send it again. This can get very annoying if you have your browser set to 'prompt' for cookies. I need to find a way to try to send it once.

Any help is greatly appreciated.
Thanks.

[Anon]

Theres no way to check that stuff.... Best way is to use sessions, it will auto add the session hash to all links/forms and will have the same effect as cookies.. But if the session gets lost in a page without session_start() it will be killed.

[warmwind]

I thought sessions used a cookie as a reference for the data?

Cookie data is usually only available to the domain / subdomains that set it; there's kind of a way around it, however.

Cookie data hits your browser piggy back-ing on headers. Say you have a page at site 'gink.com' and you want to set a cookie that will be read when they get to grunk.com.

Set up a script at grunk.com that acts like a gif; it's called say, pic.gif. The script sends back the image/gif header, with the cookie in tail, and the image data. VOILA! a cookie is set by gink.com that can be read by grunk.com (but only by grunk.com or it's affiliates ..)