All Wordpress Tricks Related with login page

wp-tricks-2-1

function custom_login_logo() {
echo '<style type="text/css">h1 a { background: url(http://www.abcd.com/image.png) 50% 50% no-repeat !important; }</style>';
}
add_action('login_head', 'custom_login_logo');

wp-tricks-2-2

function change_wp_login_url() {
echo bloginfo('url');
}
add_filter('login_headerurl', 'change_wp_login_url');

wp-tricks-2-3

function change_wp_login_title() {
echo get_option('blogname');
}
add_filter('login_headertitle', 'change_wp_login_title');

wp-tricks-2-4

function change_wp_login_title() {
echo "Some Text";
}
add_filter('login_headertitle', 'change_wp_login_title');