你可能所有不知道获取短网址跳转后的真实地址我们可以使用get_headers()函数来实现,下面我一起来看我总结的一些例子.
获取到一个短连接,需要将短连接转换成真实的网址,通过查资料,发现 PHP 提供了一个函数 get_headers(),可以完成这个任务,先把 头部信息获取到,然后再分析跳转地址即可.
利用get_headers() 函数获取http头,php 自带的get_headers()取得服务器响应一个 HTTP 请求所发送的所有标头, 获取301状态肯定没问题.
例子,代码如下:
$url = 'http://dwz.cn/29uQh7'; $headers = get_headers($url, TRUE); print_r($headers); //输出跳转到的网址 echo $headers['Location'];
//附:
Array ( [0] => HTTP/1.1 302 Moved Temporarily [Location] => http://www.phprm.com [Content-Type] => Array ( [0] => text/html;charset=UTF-8 [1] => text/html;charset=utf-8 ) [Server] => Array ( [0] => weibo [1] => BWS/1.0 ) [Content-Length] => Array ( [0] => 203 [1] => 16424 ) [Date] => Array ( [0] => Thu, 12 Dec 2013 10:42:25 GMT [1] => Thu, 12 Dec 2013 10:42:25 GMT ) [X-Varnish] => 2893360335 [Age] => 0 [Via] => 1.1 varnish [Connection] => Array ( [0] => close [1] => Close ) )
好了我们看一个获取短网址跳转之前的网址,代码如下:
$header = get_headers($url, 1); if (strpos($header[0], '301') || strpos($header[0], '302')) { if (is_array($header['Location'])) { return $header['Location'][count($header['Location'])-1]; } else { return $header['Location']; } } else { return $url; }
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