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PHP获取短链接跳转后的真实地址和响应头信息的方法_PHP

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Release: 2016-06-01 11:50:26
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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:

代码如下:


$url = 'http://t.cn/h5mwx';
$headers = get_headers($url, TRUE);

print_r($headers);

//输出跳转到的网址
echo $headers['Location'];

附完整数组:

代码如下:


Array
(
    [0] => HTTP/1.1 302 Moved Temporarily
    [Location] => http://www.baidu.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
        )
)

附:get_headers函数官方文档

get_headers — 取得服务器响应一个 HTTP 请求所发送的所有标头

说明

array get_headers ( string $url [, int $format = 0 ] )

get_headers() 返回一个数组,包含有服务器响应一个 HTTP 请求所发送的标头。

参数

url:目标 URL。

format:如果将可选的 format 参数设为 1,则 get_headers() 会解析相应的信息并设定数组的键名。

返回值

返回包含有服务器响应一个 HTTP 请求所发送标头的索引或关联数组,如果失败则返回 FALSE。

使用例子:

代码如下:


$url = 'http://www.example.com';

print_r(get_headers($url));

print_r(get_headers($url, 1));
?>


以上例程的输出类似于:

代码如下:


Array
(
    [0] => HTTP/1.1 200 OK
    [1] => Date: Sat, 29 May 2004 12:28:13 GMT
    [2] => Server: Apache/1.3.27 (Unix)  (Red-Hat/Linux)
    [3] => Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT
    [4] => ETag: "3f80f-1b6-3e1cb03b"
    [5] => Accept-Ranges: bytes
    [6] => Content-Length: 438
    [7] => Connection: close
    [8] => Content-Type: text/html
)

Array
(
    [0] => HTTP/1.1 200 OK
    [Date] => Sat, 29 May 2004 12:28:14 GMT
    [Server] => Apache/1.3.27 (Unix)  (Red-Hat/Linux)
    [Last-Modified] => Wed, 08 Jan 2003 23:11:55 GMT
    [ETag] => "3f80f-1b6-3e1cb03b"
    [Accept-Ranges] => bytes
    [Content-Length] => 438
    [Connection] => close
    [Content-Type] => text/html
)

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