Update WordPress login page logo

Set your custom logo to a WordPress login page. You can do this easily by adding the following code to the functions.php.

function my_login_logo() { ?>
    <style type="text/css">
        #login h1 a, .login h1 a {
            background-image: url(<?php echo get_stylesheet_directory_uri(); ?>/images/site-login-logo.png);
		height: 65px;
		width: 320px;
		background-size: 320px 65px;
		background-repeat: no-repeat;
        	padding-bottom: 30px;
        }
    </style>
<?php }
add_action( 'login_enqueue_scripts', 'my_login_logo' );

You can read more about editing the login page on this url.