php file_get_contents函数的使用问题

   array(11) {
      [0]=>
      string(15) "HTTP/1.1 200 OK"
      [1]=>
      string(35) "Content-Type: text/html;charset=gbk"
      [2]=>
      string(17) "Connection: close"
      [3]=>
      string(13) "Server: nginx"
      [4]=>
      string(35) "Date: Fri, 29 Oct 2010 00:36:51 GMT"
      [5]=>
      string(26) "Vary: Host,Accept-Encoding"
      [6]=>
      string(14) "Pragma: Public"
      [7]=>
      string(26) "Cache-Control: max-age=300"
      [8]=>
      string(38) "Expires: Fri, 29 Oct 2010 00:41:53 GMT"
      [9]=>
      string(22) "Content-Encoding: gzip"
      [10]=>
      string(14) "FSS-Cache: HIT"
    }