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php convert cookie to session

I have a website that uses php cookies.
Is there an easy way to convert it to session variables?

What would I need to do?

Also, is there anything I should watch out for?
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jackjohnson44
Asked:
jackjohnson44
3 Solutions
 
TeRReFCommented:
foreach($_COOKIE as $key=>$value) {
    $_SESSION[$key] = $value;
}

I don't think you need to watch out for anything, sessions are safer then cookies anyway...
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jackjohnson44Author Commented:
do I have to put anything else in my script? start the session

Also will a session persist across a move from the http side to https side of the domain?
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TeRReFCommented:
> do I have to put anything else in my script? start the session
Use
session_start();
at the beginning of your php page to start the session

> Also will a session persist across a move from the http side to https side of the domain?
Yes, that shouldn't be a problem.
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John KawakamiCommented:
Just to add on TeRReF's comment - sessions are implemented with cookies.  The session data is written to a file, and the name of that file is stored in a browser cookie named PHPSESSID.
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bobbyoCommented:
One thing to add. There is a setting in the php.ini file that will start sessions automatically

session.auto_start = 1

As for session value been stored in the cookie. This can also be enabled or disabled in the php.ini file

session.use_cookies = 1

If it is set to 0 the session variable normally PHPSESSID is maintained via the url. If you use normal href tags or forms the id should be maintained automatically in the url however if you use javascript redirects it will be lost.
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