[英]HTML DOM Parser - How to get the first post of all topics in a forum
I was trying to scrap the first post of every topics in sitepoint javascript forum. 我正在尝试在sitepoint javascript论坛中剪贴每个主题的第一篇文章。 But The DOM Parser would give me ALL THE POSTS OF EVERY TOPICS IN SITE POINT JAVASCRIPT FORUM.
但是DOM解析器会在站点点Java脚本论坛中为我提供所有主题的所有帖子。 Maybe I didn't traverse the DOM correctly ?
也许我没有正确遍历DOM? Below is my code:
下面是我的代码:
<?php
class Sitepoint extends Controller
{
public function index()
{
$this->load->helper('dom');
header('Content-Type: text/html; charset=utf-8');
echo '<ol>';
$html = file_get_html('http://www.sitepoint.com/forums/javascript-15');
foreach($html->find('a[id^="thread_title"]') as $topic) {
$post =$topic->href;
$posthtml = file_get_html($post);
$posthtml->find('div[id^="post_message"]', 0);
echo'<li>';
echo $topic->plaintext.'<br>';
echo $posthtml->plaintext.'<br>';
echo'</li>';
}
echo '</ol>';
}
}
You forgot to assign the result of $posthtml->find
to a variable: 您忘记将
$posthtml->find
的结果分配给一个变量:
foreach($html->find('a[id^="thread_title"]') as $topic) {
$post =$topic->href;
$posthtml = file_get_html($post);
$posttext = $posthtml->find('div[id^="post_message_"]', 0);
echo'<li>';
echo $topic->plaintext.'<br>';
echo $posttext->plaintext.'<br>';
echo'</li>';
}
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