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PHP 获取短网址跳转后的真实地址的实例

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Release: 2016-05-27 08:47:14
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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'];
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//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 
        ) 
)
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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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