functions.php

<?php

/**
 * Get the theme's header background image style.
 *
 * @package Omeka\Function\View\Head
 * @uses get_theme_option()
 * @return string|null
 */
function cville_theme_header_background()
{
    $headerBg = get_theme_option('Header Background');
    if ($headerBg) {
        $storage = Zend_Registry::get('storage');
        $headerBg = $storage->getUri($storage->getPathByType($headerBg, 'theme_uploads'));
        return '<style type="text/css" media="screen">header {'
           . 'background:transparent url("' . $headerBg . '") center left no-repeat;'
           . '}</style>';
    }
}