jio-login-logo.php

<?php
/*
Plugin name: Jeppes login logo
Description: tilføj eget logo til loginsiden.
*/

// Hvis ikke indstillet, tilføj custom header theme-support
if (!current_theme_supports('custom-header'){

 $args = array(
  'flex-width'    => true,
  'width'         => 80,
  'flex-height'    => true,
  'height'        => 80,
 );

 add_theme_support( 'custom-header', $args );

}

// Erstat wordpress logo, hvis header image er indstillet
function jio_login_logo() { 
 $image = get_header_image();
 if ($image !== '') : ?>
    <style type="text/css">
        .login h1 a {
            background-image: url(<?php echo $image; ?>);
            padding-bottom: 30px;
            background-size: contain;
        }
    </style>
<?php endif; }
add_action( 'login_enqueue_scripts', 'jio_login_logo' );