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PHP restores Weibo short address to actual URL_PHP tutorial
- WBOYOriginal
- 2016-07-13 10:33:551307browse
Due to the character limit in Weibo, if you post a URL, it will automatically be converted into a short URL. Several of my previous articles introduced how to convert a URL to a short URL. Here we go the other way and restore the short URL to the actual URL. Please refer to the following program to implement it with PHP:
<?php
$url = "http://163.fm/1QLJ8U";
echo unshorten($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")
$short = true;
if($short && startwith($head,"Location: "))
{
$location = substr($head,10);
}
}
return $location;
}
function startwith($Haystack, $Needle)
{
return strpos($Haystack, $Needle) === 0;
}
?>
The results of running the program are as follows:
http://www.bkjia.com/
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