WordPress Auto Login Script

WordPress-Auto-Login-Script.php

<?php

// Set a veriable for redirection (Optional)
$redirect_to = '';

/**
 * WordPress Auto login script
 */
if(!is_user_logged_in())
{
    // Take your username you want to keep for auto login.
    $username = "abcxyz";

    // Check if user exist by his username
    if($user = get_user_by('login', $username))
    {
        clean_user_cache($user->ID);

        // Removes all of the cookies associated with authentication
        wp_clear_auth_cookie();
        
        // Changes the current user by ID.
        wp_set_current_user($user->ID);

        // If secure domain then we have to set secure cookie
        wp_set_auth_cookie($user->ID, true, (!empty($_SERVER['HTTPS'])));

        update_user_caches($user);

        // If user logged in then do some action.
        if(is_user_logged_in())
        {
            // You can set redirect to create a new page
            $redirect_to = admin_url() . 'post-new.php?post_type=page';
        }
        else
        {
            // Set redirect to login page
            $redirect_to = wp_login_url();
        }
    }
}

wp_safe_redirect($redirect_to);