Removing cookies in php?

Question

PHP

Guys, good cool day!
In general, there is an authorization page /login
. You can go to it by clicking on the link in the header from any page of the site.
After authorization of the user, you need to redirect to the previous page (the one from which you went).
To do this, I create cookies at the very beginning of the file.

<?
if (!isset($_COOKIE['prev_addr'])){
    
    setcookie("prev_addr",$_SERVER["HTTP_REFERER"],time()+3600,"/");
}

?>

Then at the bottom, if the user is authorized, I overwrite cookies and redirect to the previous page.

<?
    global $USER;
    if ($USER->IsAuthorized()) {        
        $temp = $_COOKIE['prev_addr'];
        setcookie("prev_addr","",time()-10000);
        LocalRedirect($temp);        
    }  
    ?>

But the cookie is not removed.

Answer 1

In general, it can be useful to someone.
Weird. Did it before - didn't work. Thanks guys ;)

if (!isset($_COOKIE['prev_addr'])){
    
    setcookie("prev_addr",$_SERVER["HTTP_REFERER"],time()+3600,"/");
}

global $USER;
    if ($USER->IsAuthorized()) {        
        $temp = $_COOKIE['prev_addr'];
        setcookie("prev_addr","",time()-3600,"/");
        //unset($_COOKIE['prev_addr']);
        LocalRedirect($temp);        
    }

Answer 2

And even better, as you set the cookie, delete it, only with a minus sign:
setcookie("prev_addr","",time()-3600,"/");

Answer 3

When deleting, you also need to specify the path setcookie("prev_addr","",time()-10000, '/');
Check.