使用php获取缩短网址的最终网址（如bit.ly） [英] Getting final urls of shortened urls (like bit.ly) using php
问题描述
[在底部更新]
大家好。
[Updated At Bottom]
Hi everyone.
从短网址开始：
假设您有一组5个短网址a href =http://bit.ly =nofollow> http://bit.ly ），如下所示：
$shortUrlArray = array("http://bit.ly/123",
"http://bit.ly/123",
"http://bit.ly/123",
"http://bit.ly/123",
"http://bit.ly/123");
以最终重新导向的网址结尾：
我如何得到这些短url的最终url与php？像这样：
End with Final, Redirected URLs:
How can I get the final url of these short urls with php? Like this:
http ：//www.example.com/some-directory/some-page.html
http://www.example.com/some-directory/some-page.html
http://www.example.com/some-directory/some-page.html
http://www.example.com/some-directory/some -page.html
http：/ /www.example.com/some-directory/some-page.html
http://www.example.com/some-directory/some-page.html
http://www.example.com/some-directory/some-page.html
http://www.example.com/some-directory/some-page.html
http://www.example.com/some-directory/some-page.html
http://www.example.com/some-directory/some-page.html
我有一个方法（在线找到），效果很好与单个url，但是当循环在多个url，它只适用于数组中的最终url。供您参考，方法如下：
I have one method (found online) that works well with a single url, but when looping over multiple urls, it only works with the final url in the array. For your reference, the method is this:
function get_web_page( $url )
{
$options = array(
CURLOPT_RETURNTRANSFER => true, // return web page
CURLOPT_HEADER => true, // return headers
CURLOPT_FOLLOWLOCATION => true, // follow redirects
CURLOPT_ENCODING => "", // handle all encodings
CURLOPT_USERAGENT => "spider", // who am i
CURLOPT_AUTOREFERER => true, // set referer on redirect
CURLOPT_CONNECTTIMEOUT => 120, // timeout on connect
CURLOPT_TIMEOUT => 120, // timeout on response
CURLOPT_MAXREDIRS => 10, // stop after 10 redirects
);
$ch = curl_init( $url );
curl_setopt_array( $ch, $options );
$content = curl_exec( $ch );
$err = curl_errno( $ch );
$errmsg = curl_error( $ch );
$header = curl_getinfo( $ch );
curl_close( $ch );
//$header['errno'] = $err;
//$header['errmsg'] = $errmsg;
//$header['content'] = $content;
print($header[0]);
return $header;
}
//Using the above method in a for loop
$finalURLs = array();
$lineCount = count($shortUrlArray);
for($i = 0; $i <= $lineCount; $i++){
$singleShortURL = $shortUrlArray[$i];
$myUrlInfo = get_web_page( $singleShortURL );
$rawURL = $myUrlInfo["url"];
array_push($finalURLs, $rawURL);
}
关闭，但不够
此方法可行，但只能使用一个网址。我不能在一个for循环中使用它，这是我想做的。当在上面的例子中在for循环中使用时，前四个元素不变地返回，只有最后一个元素被转换为其最终的url。无论您的数组是5个元素还是500个元素，都会发生这种情况。
Close, but not enough
This method works, but only with a single url. I Can't use it in a for loop which is what I want to do. When used in the above example in a for loop, the first four elements come back unchanged, and only the final element is converted into its final url. This happens whether your array is 5 elements or 500 elements long.
解决方案：
请给我一个提示，说明如何修改此方法在一个for循环中使用的urls（而不只是一个）的集合。
Solution Sought:
Please give me a hint as to how you'd modify this method to work when used inside of a for loop with collection of urls (Rather than just one).
-OR -
如果您知道更适合此任务的代码，请将其你的答案。
If you know of code that is better suited for this task, please include it in your answer.
提前感谢。
更新：
经过一些进一步的刺激，我发现问题不在上述方法（毕竟，似乎在for循环工作正常），但可能编码。当我硬编码一个短网址的数组，循环工作正常。但是当我使用GET或POST从一个html表单中传入一个换行符分隔的URL块时，会出现上述问题。在我提交表单时，网址是否以某种方式更改为与方法不兼容的格式？
Update:
After some further prodding I've found that the problem lies not in the above method (which, after all, seems to work fine in for loops) but possibly encoding. When I hard-code an array of short urls, the loop works fine. But when I pass in a block of newline-seperated urls from an html form using GET or POST, the above mentioned problem ensues. Are the urls somehow being changed into a format not compatible with the method when I submit the form????
新更新： />
你们，我发现我的问题是由于与上述方法无关的东西。我的问题是，我的短url的URL编码转换我认为只是换行字符（分隔的urls）到这：％0D％0A这是一个换行符或返回字符...所有短url保存为集合中的最终url有一个ghost字符附加到尾部，从而使它不可能检索到那些只有最终的URL。我确定了幽灵字符，纠正了我的php爆炸，现在所有工作正常。抱歉和感谢。
New Update:
You guys, I've found that my problem was due to something unrelated to the above method. My problem was that the URL encoding of my short urls converted what i thought were just newline characters (separating the urls) into this: %0D%0A which is a line feed or return character... And that all short urls save for the final url in the collection had a "ghost" character appended to the tail, thus making it impossible to retrieve the final urls for those only. I identified the ghost character, corrected my php explode, and all works fine now. Sorry and thanks.
推荐答案
这可能有一些帮助：如何将字符串放入数组，用新行分割？
假设你得到POST中返回的URL，你可能会这样做：
You would probably do something like this, assuming you're getting the URLs returned in POST:
$final_urls = array();
$short_urls = explode( chr(10), $_POST['short_urls'] ); //You can replace chr(10) with "\n" or "\r\n", depending on how you get your urls. And of course, change $_POST['short_urls'] to the source of your string.
foreach ( $short_urls as $short ) {
$final_urls[] = get_web_page( $short );
}
我得到以下输出，使用 var_dump
I get the following output, using var_dump($final_urls); and your bit.ly url:
我的源码： $ _ POST ['short_urls'] = http://bit.ly/123\http://bit.ly/123\ nhttp://bit.ly/123\hhttp://bit.ly/123\";
我也有一个错误，使用你的函数：注意：Undefined offset：0 in /var/www/test.php on line 27 第27行： print（$ header [0]）; 我不知道你想要什么...
I also got an error, using your function: Notice: Undefined offset: 0 in /var/www/test.php on line 27 Line 27: print($header[0]); I'm not sure what you wanted there...
这是我的 test.php ，如果它会帮助： http://codepad.org/zI2wAOWL
Here's my test.php, if it will help: http://codepad.org/zI2wAOWL
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