The default image header and link on the login / register page of WordPress is a WordPress one, apparently, but when you are enabling registration / login to general users, you would want to use your own logo and website URL as the header rather than the default - so people don’t get confused and freak out!
It’s amazing how WordPress has made such simple customizations even simpler by the introduction of hooks. Just insert the following snippet in your theme’s functions.php:
add_action('login_head', 'my_custom_login_logo');
function my_custom_login_logo() {
echo '<style type="text/css">
h1 a { background-image:url('.dirname(get_bloginfo('stylesheet_url')).'/my_custom_login_logo.png) !important; }
</style>';
}
add_filter('login_headerurl', 'my_custom_login_link');
function my_custom_login_logo(){
return ('/'); // put here your website URL such as http://www.example.com/ or simply /
}Just provide your own logo and upload it to your theme directory as my_custom_login_logo.png. You can also use get_bloginfo(‘template_directory’) for theme path but that would return the parent theme path if you have a child theme. Sensibly, we would put all customizations in the child theme, so dirname(get_bloginfo(‘stylesheet_url’)) is probably a better approach.
Without editing the core files, this solution is upgrade-proof and you don’t have to install any plugin.