DOMDocument::loadHTMLFile

(PHP 5)

DOMDocument::loadHTMLFile — Load HTML from a file

說明

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.

參數

filename: The path to the HTML file.
options: Since PHP 5.4.0 and Libxml 2.6.0, you may also use the options parameter to specify additional Libxml parameters.

回傳值

如果成功則回傳 TRUE，失敗則回傳 FALSE。 If called statically, returns a DOMDocument 或者在失敗時回傳 FALSE.

錯誤/例外

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.

此方法可以被靜態呼叫，但會發出一個 E_STRICT 錯誤。

僅管非正確格式化的 HTML 仍應該被成功載入，但此函式會在遇到錯誤標記時產生 E_WARNING 錯誤。libxml 錯誤處理函式可以用來處理這類錯誤。

範例

Example #1 Creating a Document


<?php
$doc = new DOMDocument();
$doc->loadHTMLFile("filename.html");
echo $doc->saveHTML();
?>

更新日誌

版本	說明
5.4.0	Added `options` parameter.

參見

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 6 notes

down

onemanbanddan at gmail dot com ¶

10 years ago


The options for surpressing errors and warnings will not work with this as they do for loadXML()
e.g.
<?php
$doc->loadHTMLFile($file, LIBXML_NOWARNING | LIBXML_NOERROR);
?>
will not work.
you must use:
<?php
libxml_use_internal_errors(true);
$doc->loadHTMLFile($file);
?>
and handle the exceptions as neccesarry.

down

Mark Omohundro, ajamyajax dot com ¶

15 years ago


<?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";
    }
  }
}
?>

down

andy at carobert dot com ¶

18 years ago


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!

down

-4

qrworld.net ¶

9 years ago


In this post http://softontherocks.blogspot.com/2014/11/descargar-el-contenido-de-una-url_11.html I found a simple way to get the content of a URL with DOMDocument, loadHTMLFile and saveHTML().

function getURLContent($url){
    $doc = new DOMDocument;
    $doc->preserveWhiteSpace = FALSE;
    @$doc->loadHTMLFile($url);
    return $doc->saveHTML();
}

down

-14

gzech at SPAMFILTER dot eso dot org ¶

17 years ago


If you want to suppress output warnings from loadHTMLFile($url), put an @ sign in front. This even works in:
<?php
$load = @$dom->loadHTMLFile($url);
?>

down

-16

bens at effortlessis dot com ¶

19 years ago


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.

add a note