How to Change the WordPress Login Page...
This snippet allows you to easily change the URL of the logo on your WordPress login ...

WPCodeBox
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Learn how to disable XML-RPC in WordPress to enhance your website’s security and prevent potential attacks.
add_filter('xmlrpc_enabled','__return_false');
add_action('init',function() {
if(strpos($_SERVER['REQUEST_URI'],'xmlrpc.php') !== false) {
wp_redirect(home_url());
exit;
}
});