DOMDocument::loadHTML
<?php
// try this html listing example for all nodes / includes a few getElementsByTagName options:
$file = $DOCUMENT_ROOT. "test.html";
$doc = new DOMDocument();
$doc->loadHTMLFile($file);
// example 1:
$elements = $doc->getElementsByTagName('*');
// example 2:
$elements = $doc->getElementsByTagName('html');
// example 3:
//$elements = $doc->getElementsByTagName('body');
// example 4:
//$elements = $doc->getElementsByTagName('table');
// example 5:
//$elements = $doc->getElementsByTagName('div');
if (!is_null($elements)) {
foreach ($elements as $element) {
echo "<br/>". $element->nodeName. ": ";
$nodes = $element->childNodes;
foreach ($nodes as $node) {
echo $node->nodeValue. "\n";
}
}
}
?>
DOMDocument::loadHTMLFile
(PHP 5)
DOMDocument::loadHTMLFile — Load HTML from a file
说明
bool DOMDocument::loadHTMLFile
( string
$filename
)
The function parses the HTML document in the file named
filename. Unlike loading XML, HTML does not have
to be well-formed to load.
参数
-
filename -
The path to the HTML file.
返回值
成功时返回 TRUE， 或者在失败时返回 FALSE. If called statically, returns a
DOMDocument 或者在失败时返回 FALSE.
错误/异常
If an empty string is passed as the filename
or an empty file is named, a warning will be generated. This warning
is not generated by libxml and cannot be handled using libxml's error handling
functions.
此方法可以被静态调用,但会抛出一个E_STRICT错误.
尽管非正确格式化的HTML仍应该被成功调入,
但此函数会在遇到错误标记时产生E_WARNING错误.
libxml错误处理函数
可以用来处理这类错误.
范例
Example #1 Creating a Document
<?php
$doc = new DOMDocument();
$doc->loadHTMLFile("filename.html");
echo $doc->saveHTML();
?>
参见
- DOMDocument::loadHTML() - Load HTML from a string
- DOMDocument::saveHTML() - Dumps the internal document into a string using HTML formatting
- DOMDocument::saveHTMLFile() - Dumps the internal document into a file using HTML formatting
add a note
User Contributed Notes
DOMDocument::loadHTMLFile
Mark Omohundro, ajamyajax dot com
27-Nov-2008 11:32
gzech at SPAMFILTER dot eso dot org
20-Feb-2007 07:09
If you want to suppress output warnings from loadHTMLFile($url), put an @ sign in front. This even works in:
<?php
$load = @$dom->loadHTMLFile($url);
?>
Lachlan Hunt
26-Sep-2005 05:15
Andy, the code you gave should not give that result. In your code, $tag is an <a> element and the nodeValue of elements is null, according to the DOM2 spec. You need to get at the text node first, before getting the node value.
<?
...
foreach ($tags as $tag) {
echo $tag->getAttribute('href').' | '.$tag->childNodes->item(0)->nodeValue."\n";
}
?>
This should output:
/mypage1 | Hello World!
/mypage2 | Another Hello World!
andy at carobert dot com
25-May-2005 07:24
This puts the HTML into a DOM object which can be parsed by individual tags, attributes, etc.. Here is an example of getting all the 'href' attributes and corresponding node values out of the 'a' tag. Very cool....
<?php
$myhtml = <<<EOF
<html>
<head>
<title>My Page</title>
</head>
<body>
<p><a href="/mypage1">Hello World!</a></p>
<p><a href="/mypage2">Another Hello World!</a></p>
</body>
</html>
EOF;
$doc = new DOMDocument();
$doc->loadHTML($myhtml);
$tags = $doc->getElementsByTagName('a');
foreach ($tags as $tag) {
echo $tag->getAttribute('href').' | '.$tag->nodeValue."\n";
}
?>
This should output:
/mypage1 | Hello World!
/mypage2 | Another Hello World!
bens at effortlessis dot com
08-Apr-2005 11:11
Note that this function doesn't parse the individual tags WITHIN the html file - it's all loaded as a "black box", and you end up with an XML widget that comprises nothing but the complete chunk of HTML.
I was hoping it would function as a sort of HTML-validator/parser, but that doesn't seem to be the case.