有没有模仿Facebook的＆QUOT库;链路的检测＆QUOT;？ [英] Is there a library that emulates facebook's "Link Detect"?
问题描述
我期待写道：分析，当你发布链接Facebook这样的信息做了图书馆。然而，由于我不想推倒重来没有人知道一个库或和精力来写，做一个图书馆这个了吗？
I'm looking to write a library that "parses" information like facebook does when you post a link. However as I don't want to reinvent the wheel does anyone know of a library or and effort to write an Library that does this already?
我已经包含了一个例子，这样你可以得到什么，我的意思是，如果你不使用脸书一抓。 
I have included an example so that you can get a grasp of what I mean if you don't use face book.
推荐答案
还没有看到任何库，但看起来pretty简单的事情。我已经记下一个快速的功能，它可以帮助你。我一直简单，你可能要使用卷曲来获取内容，把一些错误处理，等等。
Haven't seen any library for that, but looks a pretty simple thing. I've jot down a quick function which can help you out. I have kept it simple, you might want to use cURL to fetch the content, put some error handling, etc.
总之，这里是我的两分钱：
Anyway, here is my two cents:
<?php
function getLinkInfo($url)
{
// Get target link html
$html = file_get_contents($url);
// Prepare the DOM document
$dom = new DOMDocument();
$dom->loadHTML($html);
$dom->preserveWhiteSpace = false;
// Get page title
$titles = $dom->getElementsByTagname('title');
foreach ($titles as $title) {
$linkTitle = $title->nodeValue;
}
// Get META tags
$metas = $dom->getElementsByTagname('meta');
// We only need description
foreach ($metas as $meta) {
if ($meta->getAttribute("name") == "description") {
$linkDesc = $meta->getAttribute("content");
}
}
// Get all images
$imgs = $dom->getElementsByTagname('img');
// Again, we need the first one only
foreach ($imgs as $img) {
$firstImage = $img->getAttribute("src");
if (strpos("http://", $firstImage) === false) {
$firstImage = $url . $firstImage;
}
break;
}
$output = <<<HTML
<div class="info">
<div class="image"><img src="{$firstImage}" alt="{$linkTitle}" /></div>
<div class="desc">
<div class="title">{$linkTitle}</div>
<div class="subtitle">{$url}</div>
<div class="summary">{$linkDesc}</div>
</div>
</div>
HTML;
return $output;
}
echo getLinkInfo("http://www.phpfour.com/");
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