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/* Insert into footer.php */

<?php echo comicpress_copyright(); ?>

<!-- Single Year Display -->
&copy; <?php echo date("Y"); ?> Copyright.

<!-- Website Start and Current Year -->
&copy; <?php
$copyYear = 2008; // Set your website start date
$curYear = date('Y'); // Keeps the second year updated
echo $copyYear . (($copyYear != $curYear) ? '-' . $curYear : '');
?> Copyright.

/* Read the first post date to set copyright date start */

function comicpress_copyright() {
global $wpdb;
$copyright_dates = $wpdb->get_results("
SELECT
YEAR(min(post_date_gmt)) AS firstdate,
YEAR(max(post_date_gmt)) AS lastdate
FROM
$wpdb->posts
WHERE
post_status = 'publish'
");
$output = '';
if($copyright_dates) {
$copyright = "© " . $copyright_dates[0]->firstdate;
if($copyright_dates[0]->firstdate != $copyright_dates[0]->lastdate) {
$copyright .= '-' . $copyright_dates[0]->lastdate;
}
$output = $copyright;
}
return $output;
}