Redirect WordPress Failed Logins to custom location

functions.php

// hook failed login
add_action('wp_login_failed', 'my_front_end_login_fail'); 
function my_front_end_login_fail($username){
    // Get the reffering page, where did the post submission come from?
    $referrer = $_SERVER['HTTP_REFERER'];
 
    // if there's a valid referrer, and it's not the default log-in screen
    if(!empty($referrer) && !strstr($referrer,'wp-login') && !strstr($referrer,'wp-admin')){
        // let's append some information (login=failed) to the URL for the theme to use
        wp_redirect($referrer . '?login=failed'); 
    exit;
    }
}

There’s just one problem with the above code; it will only redirect upon successful authentication! If your idea was to hide the default WordPress log-in screen, then sending users who fail at a log-in attempt back to the default log-in screen probably isn’t ideal. Here’s a hook and some code that you can put in your functions.php file that will redirect failed logins to any location of your choosing.