在&#39;中执行PHP <a href=“” action=“php here”></a> &#39;

Question

I'm trying to execute some PHP that removes a cookie from your browser (it's used for removing your login data cookie) and when you click on the button called 'Log Out'I tried using an action to do this, but it does not seem to work this way?

<?php
                    if(isset($_COOKIE['LoggedIn']) && !empty($_COOKIE['LoggedIn'])) {
                    echo "<li><a href=\"#\" action=\"setcookie(\"LoggedIn\", \"\", time(), \"/\");\">Log Out</a></li>";
                    } else {
                        echo "<li><a href=\"login.php\">Log in</a></li>";
                    }
                ?>

I am using the '\\' to change make the quotes into regular text quotes that can be placed inside the main quotes.

So my question is mainly, how will i achieve executing it correctly? I've tried it this way but it does not do a thing.

Answer 1

As far as I'm aware anchor tags ("a" tag) have no concept of an "action" attribute. I think what you want here is "onclick" instead of "action".

Occurs to me you are also trying to execute a php function in the "action" attribute, this clearly will not work - you need to create a simple javascript function that clears out the cookie. For example:

var deleteCookie = function(name,path) {
    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:01 GMT;' + (path ? ' path=' + path : '');
};

Which you can then invoke in an "onclick" on your link.

Answer 2

I reccomend just having a logout.php button which redirects to the login page after logout button has been clicked like so:

echo "<li><a href=\"logout.php\">Log Out</a></li>";

Logout.php

    //Expire Cookie
    setcookie('LoggedIn', '', time() - 60*100000, '/');

    //Redirect to page
    header( 'Location: https://www.foo.com/login.php' ) ;

Answer 3

Better still link your a href tag to a php file that runs the function you need and use

header("Location: Your URL")

To redirect back to the login page or anywhere you want

Answer 4

You could use something like this;

<a href='/?logout'>Logout</a>

if(isset($_GET['logout'])){ Logout(); }

function Logout() {

    unset( $_SESSION[''] ); // unset and session data
    session_unset();  // remove all session variables
    session_destroy(); // destroy the session
    setcookie("LoggedIn", "", time() - 36000, "/");   //unset the remember me cookie
    header( "Location: /?loggedOut=1" );
    exit;
}