验证中的三等于[重复]

I've read somewhere that === is more secure than == So should I use something like this:

    if ($user === "") {
    echo "you are not logged in";
    }

instead of

    if ($user == "") {
    echo "you are not logged in";
    }

? The question is probably stupid, but I never really used === so I don't know much about it from security standpoint.

I am strictly interested in why === is more secure than == The duplicate doesn't address that.

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