在Windows服务器上用PHP检测doc，docx，xl​​s，xlsx文档的密码保护的方法是什么？

I am looking for a solution in PHP to identify the document (doc,docx,xls,xlsx) is password protected or not?

Got a solution

$word=new COM("word.application") or die("Cannot create Word object");
  $word->Visible=false;
  $word->WindowState=2;
  $word->DisplayAlerts=false;
  // $doc = $word->Document->Open(realpath("C:\wamp\www\test\pro_1.docx"));

  $doc = $word->Documents->Open(realpath("pro_1.docx"));
  var_dump($doc);
  exit();
  $passwordProtect = $doc->Document->HasPassword;//true or false
  var_dump($passwordProtect);
  $word->ActiveDocument->Close(false);
  $word->Quit();
  $word->Release();
  $word=null;

In this, the Documents->Open is through me an error... any other better solution or can somebody tell me how this code will work?