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I am debugging an issue with a Magento system.
The problem is a duplicated Set-Cookie header, like this:
Set-Cookie: flimmit_session=search-0c30086b812519b006aa27ef4f37f15b-24; path=/; domain=.flimmit.com; httponly
Set-Cookie: flimmit_session=search-0c30086b812519b006aa27ef4f37f15b-24; path=/; domain=.flimmit.com; httponly
The cookie is set using php's setcookie command. My question is whether the incorrect use of this function can result in a duplicate Set-Cookie header, or whether I have to look somewhere else for the error...
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@RobDolinMS Also, you can't have multiple cookie headers in the request. As per RFC 6265 S5. 4: When the user agent generates an HTTP request, the user agent MUST NOT attach more than one Cookie header field.
The setcookie() function defines a cookie to be sent along with the rest of the HTTP headers. A cookie is often used to identify a user. A cookie is a small file that the server embeds on the user's computer. Each time the same computer requests a page with a browser, it will send the cookie too.
A cookie can be set or modified using the following syntax: setcookie(name, value, expire, path, domain, secure, httponly); Note that: Cookies are part of the HTTP header, so setcookie() must be called before any output is sent to the browser.
Setting a cookie with the same key will cause it to be overwritten.
Yes, calling setcookie() twice with the same data will result in 2 identical Set-Cookie: headers. I have just tried it, and it does.
It shouldn't cause a problem though, the cookie will always have the value defined by the last setcookie() call...
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