How can I set a cookie in PHP that is readable both in HTTP and HTTPS?
If this isn’t possible, what can be done? Set two cookies?
By default, a cookie can be read by both http and https at the same URL.
However, a server can optionally specify the ‘secure’ flag while setting a cookie this tells the browser to only send it over a secure channel, such as an SSL connection.
In this case the cookie will only be sent over https. A cookie not marked as secure will be sent over both http and https.
Assuming your domain name remains the same except for the resource type, cookies in PHP (or any language) can be read from both HTTP and HTTPS.
In this example, the cookies will be readable from each other.