ADD_REWRITE_RULE仅在刷新时有效

我的函数中有以下代码。php文件。我有一页projects. 我有两种自定义帖子类型：project 和projecttype. 每个项目帖子都有自己的permalink/projects/project name。项目类型确实需要显示“项目”页面。

我的代码检查url是否是项目的子页面。如果子页面是projecttype，它将加载项目页面的模板（id 8）。

if(substr( $_SERVER[\'REQUEST_URI\'], 0, 11 ) === \'/projects/\'){
  $request_subpage = str_replace(\'/\', \'\', str_replace(\'/projects/\', \'\', $_SERVER[\'REQUEST_URI\']));
  if($request_subpage !== \'\') {
    $valid_subpage_url = false;
    $project_types = get_posts( array( \'post_type\' => \'projecttype\', \'posts_per_page\' => -1 ) );
    foreach( $project_types as $project_type ) :
      if( $project_type->post_name === $request_subpage ) :
        $valid_subpage_url = true;
        break;
      endif;
    endforeach;
    //flush_rewrite_rules();
    if($valid_subpage_url) add_rewrite_rule( "^projects\\/$request_subpage$", "index.php?page_id=8", \'top\');

  }
}

当我取消注释时flush_rewrite_rules(); 我的代码有效。当我不刷新重写规则时，它就不起作用（所有projecttype子页面都返回404）。由于冲洗是一项昂贵的操作，我可能不应该使用它。

这是怎么回事？

add_filter( \'request\' , \'se336968_request\' ); function se336968_request( $query_vars ) { if(substr( $_SERVER[\'REQUEST_URI\'], 0, 11 ) === \'/projects/\'){ $request_subpage = str_replace(\'/\', \'\', str_replace(\'/projects/\', \'\', $_SERVER[\'REQUEST_URI\'])); if($request_subpage !== \'\') { $project_types = get_posts( array( \'post_type\' => \'projecttype\', \'posts_per_page\' => -1 ) ); foreach( $project_types as $project_type ) { if( $project_type->post_name === $request_subpage ) { // your current rewrite $query_vars[\'page_id\'] = 8; $query_vars[\'post_type\'] = \'page\'; // --- to open "projecttype" type post from URL --- // $query_vars[\'post_type\'] = \'projecttype\'; // $query_vars[\'projecttype\'] = $request_subpage; // unset( $query_vars[\'page_id\'], $query_vars[\'p\'], $query_vars[\'pagename\'], $query_vars[\'name\'] ); break; } } } } return $query_vars; }

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