20 PHP Snippets for Making the WordPress Admin Easier for Clients

// login page logo
function custom_login_logo() {
  echo '<style type="text/css">h1 a { background: url('.get_bloginfo('template_directory').'/companylogo.png) 50% 50% no-repeat !important; }</style>';
}
add_action('login_head', 'custom_login_logo');