WordPress实现动态获取并显示版权年份

/*

WordPress实现动态获取并显示版权年份

*/

function copyrightDate() {

	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'

	");

	if($copyright_dates) {

		$date = date('Y-m-d');

		$date = explode('-', $date);

		$copyright = "Copyright © " . $copyright_dates[0]->firstdate;

		if($copyright_dates[0]->firstdate != $date[0]) {

			$copyright .= '-' . $date[0];

		}

		echo $copyright;

	}

}

<?php copyrightDate();?>