What I need

为了进行产品页面变化测试，我正在尝试将我的产品页面url重写为如下内容：

www.website.com/products/product-x/variation/1/

What I have done

我添加了查询变量，如下所示：

/**
 * Adds variation query var
 */
function gtp_add_variation_query_vars( $vars ) {
   $vars[] = \'variation\';
   return $vars;
}
add_filter( \'query_vars\', \'gtp_add_variation_query_vars\');

我已经迷上了generate_rewrite_rules, 要添加新的重写规则，请执行以下操作：

/**
 * Adds rewrite rule for template variation paramater
 */
function gtp_add_variation_rewrite_rules() {

   global $wp_rewrite;

   // Rewrite rule with (v)ariation parameter
   $new_rules[\'products/(.+?)/variation/([0-9]*)/?$\'] = \'index.php?post_type=products&products=\' . $wp_rewrite->preg_index( 1 ) . \'&variation=\' . $wp_rewrite->preg_index( 2 );

   // Add new rewrite rules to rewrite rules array
   $wp_rewrite->rules = $wp_rewrite->rules + $new_rules;

   return $wp_rewrite->rules;

}
add_action( \'generate_rewrite_rules\', \'gtp_add_variation_rewrite_rules\' );

刷新重写规则时，在$wp_rewrite->rules 已添加阵列：

[products/(.+?)/variation/([0-9]*)/?$] => index.php?post_type=products&products=$matches[1]&variation=$matches[2]

The problem

但当我访问该页面时：www.website.com/products/product-x/variation/1/ 我有一个404。

奇怪的是，它可以在我的XAMPP本地主机副本上运行，但不能在实时站点上运行。这可能是与服务器相关的问题吗？或者另一个重写规则（但我认为这应该不是问题，因为该规则位于重写规则数组的底部）

Extra information:

我已将永久链接结构（在设置->永久链接下）设置为自定义结构"/%category%/%postname%/".

我的htaccess文件如下所示：

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

/**
 * Adds rewrite rule for template variation paramater
 */
function gtp_add_variation_rewrite_rules() {
    add_rewrite_tag( \'%variation%\', \'([0-9]*)\' );
    add_rewrite_rule( \'products/(.+?)/variation/([0-9]*)/?$\', \'index.php?post_type=products&products=$matches[1]&variation=$matches[2]\', \'top\' );
}

add_action( \'init\', \'gtp_add_variation_rewrite_rules\' );