PHP Wordpress动态获得版权年份

RT

Wordpress获得版权年份

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;
    }
}
add_filter('wp_footer', 'copyrightDate');