What is PHPSESSID

Question

I'm experimenting with cookies. I also don't have any cookies with the name PHPSESSID. Do I require it? Can I take it off?

What is its "function"? 

if (count($_POST)) {

setcookie("TestCookie", htmlspecialchars($_POST['val']), time()+3600);
}

print_r($_COOKIE);

Prints:

Array
(
    [TestCookie] => blabla
    [PHPSESSID] => el4ukv0kqbvoirg7nkp4dncpk3
)

Answer 1

PHP tracks sessions using one of two techniques. It employs cookies if they are enabled, as they are in your instance. It utilizes the URL if cookies aren't enabled. Although this can be done securely, doing so is more difficult, and frequently it isn't. for instance, session fixation

You may find a tonne of SEO guidance by searching for it. Although it is generally accepted that you should use cookies, PHP will still record your session regardless.

I hope this helps you.