Is it slower to retrieve a user’s cookie and get its value as a PHP variable, than it is to retrieve a session variable?
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Is it slower to retrieve a user’s cookie and get its value as a PHP variable, than it is to retrieve a session variable?
No. In pure technical terms, it is likely the opposite, as there would be a bit of minor overhead to initializing a session.
Cookie data comes in as part of the HTTP request no matter what, and PHP reads it into $_COOKIE by default. So it’s always going to be there. $_SESSION requires you to call
session_start()at some point.However, the performance difference between the two is going to be ridiculously small and not worth worrying about.