写入.csv而不是查询结果的网页代码。错误

Question

为什么该脚本将完整的PHP页面代码（css / html）写入.csv而不是我的查询结果？我怀疑它与COM ADODB连接/“下载文件参考”有关。我会更改连接类型，但似乎需要通过同事通信来建立COM连接。

• 将PHP与COM ADODB Microsoft Access驱动程序配合使用

  $db = $_SERVER["DOCUMENT_ROOT"]."/CS_Sites.accdb";
  $conn = new COM("ADODB.Connection") or die("Cannot start ADO");
  $conn->open("Driver={Microsoft Access Driver (*.mdb, *.accdb)};Dbq=$db");
  
  $SRes_Q = $_POST["SiteResponsibilityQuery"];    
  
  $query = "SELECT [Site Name]";
  $query .= "FROM [Site Prioritization Factors]";
  $query .= "WHERE [Site Responsibility]= '$SRes_Q'";
  $rs = $conn->execute($query);
  
  //File reference for download.
  $filename = "CS_Site_Query_" . date('Ymd') . ".csv";
  header("Content-Disposition: attachment; filename=\"$filename\"");
  header("Content-Type: text/csv");
  $out = fopen('php://output', 'w');
  
  foreach($rs as $fields){
   fputcsv($out, $fields); 
  }
  fclose($out);