StackOverflow上有许多关于如何实现这一点的有用线程，但这里有一个小的WP解决方案，您可以在不修改.htaccess 文件：

add_action(\'init\', function() {

    $redirect_to_domain = \'google.com\'; // without protocol
    $https = false; // redirect to https ( default: http )

    // don\'t change the following unless you know what you\'re doing
    $domain = str_replace( array(\'http://\', \'https://\'), \'\', get_site_url() );
    $uri = $_SERVER[\'HTTP_HOST\'] . $_SERVER[\'REQUEST_URI\'];

    wp_redirect( ( $https ? "https://" : "http://" ) . str_replace( $domain, $redirect_to_domain, $uri ) );
    exit;

});

希望这有帮助。