how to delete all cookies of my website in php

user_263851 0
Viewed 163743

I'm wondering if I can delete all my website's cookies when a user click on logout, because I used this as function to delete cookies but it isn't work properly:

setcookie("user",false);

Is there a way to delete one domain's cookies in PHP?

cookies php
12 Answers

PHP setcookie()

Taken from that page, this will unset all of the cookies for your domain:

// unset cookies
if (isset($_SERVER['HTTP_COOKIE'])) {
    $cookies = explode(';', $_SERVER['HTTP_COOKIE']);
    foreach($cookies as $cookie) {
        $parts = explode('=', $cookie);
        $name = trim($parts[0]);
        setcookie($name, '', time()-1000);
        setcookie($name, '', time()-1000, '/');
    }
}

http://www.php.net/manual/en/function.setcookie.php#73484

user_150990 
$past = time() - 3600;
foreach ( $_COOKIE as $key => $value )
{
    setcookie( $key, $value, $past, '/' );
}

Even better is however to remember (or store it somewhere) which cookies are set with your application on a domain and delete all those directly.
That way you can be sure to delete all values correctly.

user_2160740

make sure you call your setcookie function before any output happens on your site.

also, if your users are logging out, you should also delete/invalidate their session variables.

user_1129680

Use the function to clear cookies:

function clearCookies($clearSession = false)
{
    $past = time() - 3600;
    if ($clearSession === false)
        $sessionId = session_id();
    foreach ($_COOKIE as $key => $value)
    {
        if ($clearSession !== false || $value !== $sessionId)
            setcookie($key, $value, $past, '/');
    }
}

If you pass true then it clears session data, otherwise session data is preserved.

user_24526800

I had to add the following to the top answer to actually remove a few cookies that wouldn't go away:

foreach($_COOKIE as $cook) {
    setcookie($cook, '', time()-1000);
    setcookie($cook, '', time()-1000, '/');
}
user_115991570
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