title: How to install PHP in IIS 7.5, Windows Server 2008 R2 (64bits)
body: <p>In <a href="http://windows.php.net/downloads" rel="noreferrer">http://windows.php.net/downloads</a> I couldn't find any x64 built for download.
  Further I have to choose among "Thread Safe" and "Non Thread Safe" with no explanation whether one is safer than the other or it performs better. The <em>install.txt</em> inside the available ZIPs for download seems out-dated an it doesn't mention anything about this.</p>
  
  <p>In <a href="http://php.net/manual/pl/install.windows.iis7.php" rel="noreferrer">http://php.net/manual/pl/install.windows.iis7.php</a> they don't say a word about it either... </p>
  
  <p>Another doubt is once I know what to download (and why), should it be setup as a FastCGI module or as an ISAPI extension?</p>