dr_cd_save_thumbnails();

function dr_cd_save_thumbnails(){
    $wp_query = query_posts(array(
    'post_type' => 'issue',
    'posts_per_page' => '-1'
    ));

    // the loop
    if (have_posts()) : while (have_posts()) : the_post();

        //Companies
        $daID = get_the_ID();
        $path = get_post_meta($daID, "toc_cover_image", true);
        $fixpath = explode('/',$path);

        $datfile = 'http://digitalrelativity.net/wp-content/uploads/'.$fixpath[2].'/'.$fixpath[3].'/'.$fixpath[4];

        dr_cd_set_featured_image($daID,$datfile);
        sleep(.5);
        echo $datfile . '<br>';

    endwhile;

    endif;

    wp_reset_query();

}

function dr_cd_set_featured_image($post_id,$filename) {
    $wp_filetype = wp_check_filetype(basename($filename), null );
    $attachment = array(
        'post_mime_type' => $wp_filetype['type'],
        'post_title' => preg_replace('/\.[^.]+$/', '', basename($filename)),
        'post_content' => '',
        'post_status' => 'inherit'
    );
    $attach_id = wp_insert_attachment( $attachment, $filename, $post_id );
    echo $attach_id;
    // you must first include the image.php file
    // for the function wp_generate_attachment_metadata() to work
    require_once($_SERVER['DOCUMENT_ROOT'] . "/wp-admin" . '/includes/image.php');

    $attach_data = wp_generate_attachment_metadata( $attach_id, $filename );

    echo '<pre>';
    var_dump( $attach_data);
    echo '</pre>';


    if (wp_update_attachment_metadata( $attach_id,  $attach_data )) {
        // set as featured image
        return update_post_meta($post_id, '_thumbnail_id', $attach_id);
    }
}