DOMDocument
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DOMDocument::loadHTMLFile

(PHP 5)

DOMDocument::loadHTMLFile — Load HTML from a file

说明

public bool DOMDocument::loadHTMLFile ( string $filename [, int $options = 0 ] )

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.

options

Since PHP 5.1.0 and Libxml 2.6.0, you may also use the options parameter to specify additional Libxml parameters.

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();
?>

更新日志

版本 说明
5.1.0 Added options parameter.

参见

DOMDocument
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PHP手册

用户评论:

Mark Omohundro, ajamyajax dot com (2008-11-28 06:32:00)

<?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";
    }
  }
}
?>

gzech at SPAMFILTER dot eso dot org (2007-02-21 02:09:01)

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 (2005-09-26 23:15:13)

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 (2005-05-25 13:24:28)

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 (2005-04-08 17:11:57)

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.

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