例如，此代码

class My_Sitemap
{
    public static function install()
    {
        add_filter(\'rewrite_rules_array\', array(__CLASS__, \'rewriteRules\'), 1, 1);
        global $wp_rewrite;
        $wp_rewrite->flush_rules(false);
    }

    public static function rewriteRules($wpRules)
    {
        $rules = array(
            \'sitemap\\.xml$\' => \'index.php?pagename=my-sitemap\',
        );
        return array_merge($rules, $wpRules);
    }

    public static function parseRequest($wp)
    {
        if (!isset($wp->query_vars[\'pagename\'])) {
            return true;
        }
        if ($wp->query_vars[\'pagename\'] !== \'minimal-xml-sitemap\') {
            return true;
        }
        self::outputXML();
    }

    public static function outputXML()
    {
        echo \'hello\';
    }
}

register_activation_hook(__FILE__, array(\'My_Sitemap\', \'install\'));
add_action(\'parse_request\', array(\'My_Sitemap\', \'parseRequest\'));

重写规则是sitemap\\.xml$, 难道不是吗^sitemap\\.xml$? 如果我去我的网站。com/asitemap。xml它不工作，但mysite。com/sitemap。xml有效。哪一个是正确的？

rule \'foo\' matched url \'foo\'
rule \'^foo\' matched url \'foo\'
rule \'foo\' did not match url \'afoo\'
rule \'^foo\' did not much url \'afoo\'
rule \'.*foo\' matched url \'afoo\'