Is it good practice to override cookie expiration setting?

Question

I see the use of the following code snippet:

    $cookieexpiry=(time()+21600);
    setcookie("rwphp","$cookieid",$cookieexpiry,"/",$_SERVER["HTTP_HOST"],0);
    unset($cookieexpiry);

Q1> My question is whether it is really good practice to cancel $ cookieexpiry.

Q2> In general cases, when should I disable variables?

thank

Answer 1

The only thing unset does in this case is to free the $ cookieexpiry variable. This will not affect your cookie.

I think you are a little confused because of the name of your variable, but all $ cookieexpiry is a number representing time and nothing more.

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Answer 3

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