如何使用dom php解析器 [英] how to use dom php parser
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问题描述
我刚刚在PHP中解析DOM：
我有一个我想要解析的HTML文件。它有一堆这样的DIV：
< div id =interestingbox>
< div id =interestingdetailsclass =txtnormal>
< div> Content1< / div>
< div> Content2< / div>
< / div>
< / div>
< div id =interestingbox>
...
我正在尝试获取许多内容div框使用php。
如何使用DOM解析器来执行此操作？
谢谢！
解决方案首先我要告诉你，你不能在两个不同的div上使用相同的id;那里有类。每个元素都应该有唯一的ID。
使用id =interestingbox获取div的内容的代码
$ html ='
< html>
< head>< / head>
< body>
< div id =interestingbox>
< div id =interestingdetailsclass =txtnormal>
< div> Content1< / div>
< div> Content2< / div>
< / div>
< / div>
< div id =interestingbox2>< a href =＃>链接< / a>< / div>
< / body>
< / html>';
$ dom_document = new DOMDocument（）;
$ dom_document-> loadHTML（$ html）;
//使用DOMXpath使用DOM导航html
$ dom_xpath = new DOMXpath（$ dom_document）;
//如果你想得到的div与id = funbox
$ elements = $ dom_xpath-> query（* / div [@ id ='interestingbox']）;
if（！is_null（$ elements））{
foreach（$ elements as $ element）{
echo\\\
[。 $元素 - >节点名称。 ];
$ nodes = $ element-> childNodes;
foreach（$ nodes as $ node）{
echo $ node-> nodeValue。 \\\
;
}
}
}
// OUTPUT
[div] {
Content1
Content2
}
课程示例：
$ html ='
< html>
< head>< / head>
< body>
< div class =interestingbox>
< div id =interestingdetailsclass =txtnormal>
< div> Content1< / div>
< div> Content2< / div>
< / div>
< / div>
< div class =interestingbox>< a href =＃>链接< / a>< / div>
< / body>
< / html>';
//与以前一样..只是更改xpath
[...]
$ elements = $ dom_xpath->查询（ * /格[@类= 'interestingbox']）;
[...]
// OUTPUT
[div] {
Content1
Content2
}
[div] {
a link
}
参考 DOMXPath 页面了解更多详情。
I'm new to DOM parsing in PHP:
I have a HTML file that I'm trying to parse. It has a bunch of DIVs like this:
<div id="interestingbox">
<div id="interestingdetails" class="txtnormal">
<div>Content1</div>
<div>Content2</div>
</div>
</div>
<div id="interestingbox">
......
I'm trying to get the contents of the many div boxes using php. How can I use the DOM parser to do this?
Thanks!
解决方案
First i have to tell you that you can't use the same id on two different divs; there are classes for that point. Every element should have an unique id.
Code to get the contents of the div with id="interestingbox"
$html = '
<html>
<head></head>
<body>
<div id="interestingbox">
<div id="interestingdetails" class="txtnormal">
<div>Content1</div>
<div>Content2</div>
</div>
</div>
<div id="interestingbox2"><a href="#">a link</a></div>
</body>
</html>';
$dom_document = new DOMDocument();
$dom_document->loadHTML($html);
//use DOMXpath to navigate the html with the DOM
$dom_xpath = new DOMXpath($dom_document);
// if you want to get the div with id=interestingbox
$elements = $dom_xpath->query("*/div[@id='interestingbox']");
if (!is_null($elements)) {
foreach ($elements as $element) {
echo "\n[". $element->nodeName. "]";
$nodes = $element->childNodes;
foreach ($nodes as $node) {
echo $node->nodeValue. "\n";
}
}
}
//OUTPUT
[div] {
Content1
Content2
}
Example with classes:
$html = '
<html>
<head></head>
<body>
<div class="interestingbox">
<div id="interestingdetails" class="txtnormal">
<div>Content1</div>
<div>Content2</div>
</div>
</div>
<div class="interestingbox"><a href="#">a link</a></div>
</body>
</html>';
//the same as before.. just change the xpath
[...]
$elements = $dom_xpath->query("*/div[@class='interestingbox']");
[...]
//OUTPUT
[div] {
Content1
Content2
}
[div] {
a link
}
Refer to the DOMXPath page for more details.
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