从远程网站拉取HTML内容并显示在页面上 [英] Pull HTML content from remote website and display on page
问题描述
现在在这个工作了一段时间，我被骗了。我试图从远程网站页面上的特定div中拉内容，然后将该html插入到我自己的网站上的div。我知道你不能只为这种类型的操作使用jQuery的.ajax，.load或.get方法。
Been working on this for a little while now and am stumped. I am attempting to pull the content from within a specific div on a remote website page and then insert that html into a div on my own website. I know that you cannot solely use jQuery's .ajax, .load, or .get methods for this type of operation.
这是远程页面的HTML：
Here's the remote page's HTML:
<html>
<body>
<div class="entry-content">
<table class="table">
...table #1 content...
...More table content...
</table>
<table class="table">
...table #2 content...
</table>
<table class="table">
...table #3 content...
</table>
</div>
</body>
</html>
目标：
我尝试从远程页面的第一个表。所以，在我的网站上，我想获取以下html并放置在id =fetched-html的div中：
Goal: I am attempting to fetch the html from the remote page's first table. So, on my website, I would like the following html to be fetched and placed in a div of id="fetched-html":
<table class="table">
...table #1 content...
...More table content...
</table>
这里是我的PHP函数到目前为止：
Here's where I'm at with my PHP function thus far:
<?php
function pullRaspi_SDImageTable() {
$url = "http://www.raspberrypi.org/downloads";
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
$output = curl_exec($curl);
curl_close($curl);
// Create new PHP DOM document
$DOM = new DOMDocument;
// Load html from curl request into document model
$DOM->loadHTML($output);
// Get 1st table
$output = $DOM->firstChild->getElementsByTagName('table');
return $output;
}
?>
最终结果在我的本地网站页面上应如下所示：
The final result should look like this on my local website page:
<div id="fetched-html">
<table class="table">
...table #1 content...
...More table content...
</table>
</div>
这是另一个PHP函数的可能性吗？
Here's another PHP function possibility?
<?php
function pullRaspPi_SDImageTable() {
// Url to fetch
$url = "http://www.raspberrypi.org/downloads";
$ch = curl_init($url);
$fp = fopen("raspberrypi_sdimagetable.txt", "w");
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
// Write html source to variable
$rasp_sdimagetable = curl_exec($ch);
// Close curl request
curl_close($ch);
return $rasp_sdimagetable;
}
// Then in the head of the html, add this jQuery:
<script type="text/javascript">
$("#fetched-html").load("<?php pullRaspPi_SDImageTable(); ?> table.table:first");
</script>
问题是，这两个函数都不工作。 （任何想法？
Problem is, neither function works. :( Any thoughts?
推荐答案
从网站中提取HTML的片段很容易， simplehtmldom 你可以这样做：
Extracting a fragment of HTML from a website is a breeze with simplehtmldom you can then do something like:
function pullRaspi_SDImageTable() {
$filename = '/tmp/downloads.html'; /// Where you want to cache the result
$expiry = 600; // 10 minutes
$output = '';
if (!file_exists($filename) || time() - $expiry > filemtime($filename)) {
// There is no cache, so fetch the results from remote server
require_once('simple_html_dom.php');
$html = file_get_html('http://www.raspberrypi.org/downloads');
foreach($html->find('div.entry-content table.table') as $elem) {
$output .= (string)$elem;
}
// Store the cache
file_put_contents($filename, $output);
} else {
// Pull the content from the cahce
$output = file_get_contents($filename);
}
return $output;
}
这将给你 table.table HTML
Which will give you the table.table HTML
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