Clearing cookie on logout and session expiration

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I would like to clear the session cookie when a user logs out or when their session expires. I understand that wp_clear_auth_cookie(); clears the cookie but I am struggling to understand how to implement it. I am using the following code to log a user out automatically if they are inactive for 10 minutes. (I think I found that in here too) 

function myplugin_cookie_expiration( $expiration, $user_id, $remember ) {
    return $remember ? $expiration : 600;
}
add_filter( 'auth_cookie_expiration', 'myplugin_cookie_expiration', 99, 3 );

Could someone kindly direct me to the right direction to achieve this result?

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1 comment

  1. Try setting $experation to a negative integer:

    function myplugin_cookie_expiration( $expiration, $user_id, $remember ) {
    return $remember ? $expiration : -600;
}
add_filter( 'auth_cookie_expiration', 'myplugin_cookie_expiration', 99, 3 );

    From the w3schools PHP page on cookies:

    <?php
// set the expiration date to one hour ago
setcookie("user", "", time()-3600);
?>