Custom Admin Login logo

Change the blue WordPress logo that is branding your various login pages? Create your custom login image, name it “custom-login-logo.png”, and upload it to your theme’s /images/ directory. This code will take care of the rest:

// custom admin login logo
function custom_login_logo() {
	echo '<style type="text/css">
	h1 a { background-image: url('.get_bloginfo('template_directory').'/images/custom-login-logo.png) !important; }
add_action('login_head', 'custom_login_logo');