PHP:如何扩展/收缩 Tinyurls

Question

在 PHP 中，如何复制 tinyurls 的扩展/收缩功能，就像在 search.twitter.com 上一样？

Answer 1

如果你想找出一个 tinyurl 的去向，使用 fsockopen 在端口 80 上连接到 tinyurl.com，然后像这样向它发送一个 HTTP 请求

GET /dmsfm HTTP/1.0
Host: tinyurl.com

你得到的响应看起来像

HTTP/1.0 301 Moved Permanently
Connection: close
X-Powered-By: PHP/5.2.6
Location: http://en.wikipedia.org/wiki/TinyURL
Content-type: text/html
Content-Length: 0
Date: Mon, 15 Sep 2008 12:29:04 GMT
Server: TinyURL/1.6

示例代码...

<?php
$tinyurl="dmsfm";

$fp = fsockopen("tinyurl.com", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br />\n";
} else {
    $out = "GET /$tinyurl HTTP/1.0\r\n";
    $out .= "Host: tinyurl.com\r\n";
    $out .= "Connection: Close\r\n\r\n";

    $response="";

    fwrite($fp, $out);
    while (!feof($fp)) {
        $response.=fgets($fp, 128);
    }
    fclose($fp);

    //now parse the Location: header out of the response

}
?>