PHP Sessions & Cookies

PythonPython Forum LeaderThe Royal RAM
Got a few questions about sessions and cookies in PHP...

Firstly sessions
Anyone know of any good, fairly detailed tutorials explaining sessions and how they are used in membership scripts...

And cookies...
How can you create a secure login script which cannot be 'hacked' through modifying the cookie info... or so that it is very hard?

Setting a cookie upon succesful login is easy and so is checking it but someone could change for example the userid in the cookie so they access another users account...

Thanks

The Royal Ram

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