DomDocument类无法访问domnode [英] DomDocument class unable access domnode
本文介绍了DomDocument类无法访问domnode的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我不解析这个网址： http://foldmunka.net
$ch = curl_init("http://foldmunka.net");
//curl_setopt($ch, CURLOPT_NOBODY, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
//curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); //not necessary unless the file redirects (like the PHP example we're using here)
$data = curl_exec($ch);
$info = curl_getinfo($ch);
curl_close($ch);
clearstatcache();
if ($data === false) {
echo 'cURL failed';
exit;
}
$dom = new DOMDocument();
$data = mb_convert_encoding($data, 'HTML-ENTITIES', "utf-8");
$data = preg_replace('/<\!\-\-\[if(.*)\]>/', '', $data);
$data = str_replace('<![endif]-->', '', $data);
$data = str_replace('<!--', '', $data);
$data = str_replace('-->', '', $data);
$data = preg_replace('@<script[^>]*?>.*?</script>@si', '', $data);
$data = preg_replace('@<style[^>]*?>.*?</style>@si', '', $data);
$data = mb_convert_encoding($data, 'HTML-ENTITIES', "utf-8");
@$dom->loadHTML($data);
$els = $dom->getElementsByTagName('*');
foreach($els as $el){
print $el->nodeName." | ".$el->getAttribute('content')."<hr />";
if($el->getAttribute('title'))$el->nodeValue = $el->getAttribute('title')." ".$el->nodeValue;
if($el->getAttribute('alt'))$el->nodeValue = $el->getAttribute('alt')." ".$el->nodeValue;
print $el->nodeName." | ".$el->nodeValue."<hr />";
}
我需要顺序 alt，title属性和简单的文本，但是这个页面我不能访问body标签中的节点。
I need sequentially the alt, title attributes and the simple text, but this page i cannot access the nodes within the body tag.
推荐答案
这是一个解决方案，使用DomDocument和DOMXPath 。它比使用简单的HTML DOM解析器的其他解决方案短得多，运行速度更快（约〜100ms，对〜2300ms）。
Here is a solution with DomDocument and DOMXPath. It is much shorter and runs much faster (~100ms against ~2300ms) than the other solution with Simple HTML DOM Parser.
<?php
function makePlainText($source)
{
$dom = new DOMDocument();
$dom->loadHtmlFile($source);
// use this instead of loadHtmlFile() to load from string:
//$dom->loadHtml('<html><title>Hello</title><body>Hello this site<img src="asdasd.jpg" alt="alt attr" title="title attr"><a href="open.php" alt="alt attr" title="title attr">click</a> Some text.</body></html>');
$xpath = new DOMXPath($dom);
$plain = '';
foreach ($xpath->query('//text()|//a|//img') as $node)
{
if ($node->nodeName == '#cdata-section')
continue;
if ($node instanceof DOMElement)
{
if ($node->hasAttribute('alt'))
$plain .= $node->getAttribute('alt') . ' ';
if ($node->hasAttribute('title'))
$plain .= $node->getAttribute('title') . ' ';
}
if ($node instanceof DOMText)
$plain .= $node->textContent . ' ';
}
return $plain;
}
echo makePlainText('http://foldmunka.net');
这篇关于DomDocument类无法访问domnode的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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