抛开所有 SEO 和重复内容问题：
WordPress 知道它应该在数据库中回答的域。 WordPress 网站本身将也根据 WordPress 仪表板中设置的域名进行重定向（在“设置”=>“常规”下）。
这在使用 htaccess 时效果不佳。您实际上希望域名http://otherdomain.com 指向mywebsite.com 所在的服务器（不使用转发，而是修改DNS 中的A 记录）。原因是当你重写域名时，WordPress 站点也会在该域中查找 css 和 js 文件（在 otherdomain.com 处查找它们）。如果您将域指向 WordPress 服务器，这将正常工作。
为了使 WordPress 允许“回答”多个域，您需要修改 WordPress 安装中的代码，使其不会将 url 重写为 http://mywebsite.com。为此，请将以下 PHP 代码添加到 WordPress 主题的 function.php 文件中：
您需要做的是将过滤器添加到返回站点 URL 的相关挂钩中，以便您可以根据需要对其进行修改：
// This will allow you to modify the site url that is stored in the db when it is requested by WP
add_filter('option_siteurl', 'my_custom_filter_siteurl', 1);
// This will allow you to modify the home page url that is stored in the db when it is requested by WP
add_filter('option_home', 'my_custom_filter_home', 1);
// Modify the site url that WP gets from the database if appropriate
function my_custom_filter_siteurl( $url_from_settings ) {
// Call our function to find out if this is a legit domain or not
$current_domain = my_custom_is_domain_valid();
// If so, use it
if ( $current_domain ) {
return "http://{$current_domain}";
// Otherwise, use the default url from settings
} else {
return $url_from_settings;
}
}
// Modify the home page url that WP gets from the database if appropriate
function my_custom_filter_home( $home_from_settings ) {
// Call our function to find out if this is a legit domain or not
$current_domain = my_custom_is_domain_valid();
// If so, use it
if ( $current_domain ) {
$base_url = "http://{$current_domain}";
// Modify / remove this as appropriate. Could be simply return $base_url;
return $base_url . "/home-page";
// Otherwise, use the default url from settings
} else {
return $home_from_settings;
}
}
// Utility function to determine URL and whether valid or not
function my_custom_is_domain_valid() {
// Create a whitelist of valid domains you want to answer to
$valid = array(
'otherdomain.com',
'mywebsite.com.br',
);
// Get the current domain name
$current_server = $_SERVER['SERVER_NAME'];
// If it's a whitelisted domain, return the domain
if ( in_array( $current_server, $valid ) ) {
return $current_server;
}
// Otherwise return false so we can use the default set in the DB
return FALSE;
}
添加以下过滤器和函数将导致所需页面显示为主页，URL 中没有/page：
// This will allow you to modify if a page should be shown on the home page
add_filter('option_show_on_front', 'my_custom_show_on_front');
// This will allow you to modify WHICH page should be shown on the home page
add_filter('option_page_on_front', 'my_custom_page_on_front');
// Modify if a page should be shown on the home page
function my_custom_show_on_front( $default_value ) {
// We only want to do this on specific domain
$is_other_domain = my_custom_is_other_domain();
// Ensure it's the domain we want to show the specific page for
if ( $is_other_domain ) {
return 'page';
// Otherwise, use the default setting
} else {
return $default_value;
}
}
// Modify WHICH should be shown on the home page
function my_custom_page_on_front( $default_value ) {
// We only want to do this on specific domain
$is_other_domain = my_custom_is_other_domain();
// Ensure it's the domain we want to show the specific page for
if ( $is_other_domain ) {
// If it's the proper domain, set a specific page to show
// Alter the number below to be the ID of the page you want to show
return 5;
} else {
// Otherwise, use the default setting
return $default_value;
}
}
// Utility function to easily determine if the current domain is the "other" domain
function my_custom_is_other_domain() {
$current_domain = my_custom_is_domain_valid();
return ($current_domain == 'otherdomain.com') ? $current_domain : FALSE;
}