Php根据短地址转换为源地址


		<?php
$url = "http://dwz.im/14P";
echo unshorten ( $url );
 
function unshorten($url) {
 $url = trim ( $url );
 $headers = get_headers ( $url );
 $location = $url;
 $short = false;
 foreach ( $headers as $head ) {
  if ($head == "HTTP/1.1 302 Found" || $head == 'HTTP/1.0 301 Moved Permanently')
   $short = true;
  if ($short && startwith ( $head, "Location: " )) {
   $location = substr ( $head, 10 );//Location:  10个字符
  }
 }
 return $location;
}
 
function startwith($Haystack, $Needle) {
 return strpos ( $Haystack, $Needle ) === 0;
}
 
/* Array
(
  [0] => HTTP/1.0 301 Moved Permanently
  [1] => Date: Mon, 04 Feb 2013 06:46:04 GMT
  [2] => Server: LiteSpeed
  [3] => Connection: close
  [4] => X-Powered-By: PHP/5.3.20
  [5] => Location: http://yxmhero1989.blog.163.com
  [6] => Content-Type: text/html
  [7] => Content-Length: 0
  [8] => Vary: User-Agent
  [9] => HTTP/1.1 200 OK
  [10] => Server: nginx
  [11] => Date: Mon, 04 Feb 2013 06:46:05 GMT
  [12] => Content-Type: text/html;charset=GBK
  [13] => Connection: close
  [14] => Vary: Accept-Encoding
  [15] => Vary: Host,Accept-Encoding
  [16] => Set-Cookie: USERTRACK=61.170.229.53.1359960365378463; path=/; expires=Fri, 05-Apr-13 06:46:05 GMT; domain=.163.com
  [17] => Set-Cookie: NTESBLOGSI=B9DAF1AA5E615128B7B79DCCF95AB455.app-71-8010; Domain=.blog.163.com; Path=/
  [18] => Cache-Control: must-revalidate
  [19] => Expires: Mon, 25 Apr 2005 21:10:50 GMT
  [20] => Last-Modified: Mon, 04 Feb 2013 06:46:05 GMT
  ) */
 
?>

补充：Web开发 , php ,