(PHP 5, PHP 7, PHP 8)
DOMDocument::loadHTMLFile — Load HTML from a file
The function parses the HTML document in the file named
filename. Unlike loading XML, HTML does not have
to be well-formed to load.
filenameThe path to the HTML file.
options
Since Libxml 2.6.0, you may also use the
options parameter to specify additional Libxml parameters.
Retorna true em caso de sucesso ou false em caso de falha. If called statically, returns a
DOMDocument ou false em caso de falha.
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.
Este método pode ser chamado estaticamente, mas emitirá um erro E_STRICT.
Enquanto HTML malformado deve carregar com sucesso, esta função pode gerar erros E_WARNING quando encontra marcação ruim. libxml's funções de tratamento de erros pode ser usado para lidar com esses erros.
Exemplo #1 Creating a Document
<?php
$doc = new DOMDocument();
$doc->loadHTMLFile("filename.html");
echo $doc->saveHTML();
?>
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.
<?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";
}
}
}
?>
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!
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 $doc->saveHTML();
}
If you want to suppress output warnings from loadHTMLFile($url), put an @ sign in front. This even works in:
<?php
$load = @$dom->loadHTMLFile($url);
?>
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.
