[PHP/Javascrip]Delete cookie set by another domain

[kingpuka]

I need to be able to use a script on "http://www.domain1.com" that will delete a cookie stored on your computer that was set by "http://www.domain2.com".

I've tried using the following in php:

setcookie ("cookiename","", time()-3600,"/main/","http://www.domain2.com");

but it isnt working. I guess it wont let me delete it from a different site, even though i told it the site it was coming from.

Please help!

[LAD]

That would be a security risk if it allows you to do that. You can't do it.

[kingpuka]

  LAD said:

That would be a security risk if it allows you to do that. You can't do it.

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Okay...hmm...

Then is it possible to delete all the cookies that are stored on your computer using a javascript or php script?

[LAD]

Nope, again, that would be a BIG security risk. Imagine I'm setting up a page that would delete all of the cookies from Amazon on your computer. You can only modify/delete cookies from the same domain that was used to create them.

[kingpuka]

  LAD said:

Nope, again, that would be a BIG security risk. Imagine I'm setting up a page that would delete all of the cookies from Amazon on your computer. You can only modify/delete cookies from the same domain that was used to create them.

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what is the security risk? You can manually delete cookies from your browser, what is the difference with the script?

[Jerry Grey Member]

  kingpuka said:

what is the security risk? You can manually delete cookies from your browser, what is the difference with the script?

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well if you can delete a cookie that was set by other domain, then you can modify the cookie, that the other domain sets. So your website can get information about the person.. Like e-mails address, username, passwords, etc..

[kingpuka]

  gerry.74 said:

well if you can delete a cookie that was set by other domain, then you can modify the cookie, that the other domain sets. So your website can get information about the person.. Like e-mails address, username, passwords, etc..

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ah, but you can view that stuff from your browser. (at least in firefox).

Is there a way to clear all the cookies on your computer, using a script of some sort. I don't want to view any of them, just have a button that when clicked will clear all the cookies stored on your computer.

[GatorV]

It's not possible, like they have told you it's a BIG security risk and the way browsers are programmed you can't delete the cookies, your best bet it's to paste a tutorial to tell the user to clean them..

[kingpuka]

Okay. Thanks everyone for the clarification and help!