[edit] Last updated: Fri, 24 May 2013

DOMDocument::loadHTML

(PHP 5)

DOMDocument::loadHTML — Charge du code HTML à partir d'une chaîne de caractères

Description

bool DOMDocument::loadHTML ( string $source )

Cette fonction analyse un document HTML contenu dans la chaîne source. Contrairement au XML, le HTML n'a pas besoin d'être bien formé pour être chargé. Cette fonction peut aussi être appelée statiquement pour charger et créer un objet DOMDocument. L'appel statique peut être utilisé lorsque vous n'avez besoin de configurer aucune propriété de DOMDocument avant le chargement.

Liste de paramètres

source: La chaîne HTML.

Valeurs de retour

Cette fonction retourne TRUE en cas de succès ou FALSE si une erreur survient. Si appelée statiquement, retourne un DOMDocument ou FALSE si une erreur survient.

Erreurs / Exceptions

Si une chaîne vide est passée comme paramètre source, une alerte sera générée. Cette alerte n'est pas générée par libxml, et ne peut être gérée en utilisant les fonctions de gestion d'erreur de libxml.

Cette méthode peut être appelée statiquement, mais enverra une erreur E_STRICT.

Bien que le HTML mal-formé devrait se charger avec succès, cette fonction peut générer une alerte de type E_WARNING lorsqu'elle rencontre une mauvaise balise. Les fonctions de gestion des erreurs libxml peuvent être utilisées pour gérer ces erreurs.

Exemples

Exemple #1 Création d'un document


<?php
$doc = new DOMDocument();
$doc->loadHTML("<html><body>Test<br></body></html>");
echo $doc->saveHTML();
?>

Voir aussi

DOMDocument::loadHTMLFile() - Charge du HTML à partir d'un fichier
DOMDocument::saveHTML() - Sauvegarde le document interne dans une chaîne en utilisant un formatage HTML
DOMDocument::saveHTMLFile() - Sauvegarde un document interne dans un fichier en utilisant un formatage HTML

DOMDocument::loadHTMLFile

DOMDocument::load

[edit] Last updated: Fri, 24 May 2013

add a note User Contributed Notes DOMDocument::loadHTML - [11 notes]

down

mdmitry at gmail dot com ¶

3 years ago


You can also load HTML as UTF-8 using this simple hack:



<?php



$doc = new DOMDocument();

$doc->loadHTML('<?xml encoding="UTF-8">' . $html);



// dirty fix

foreach ($doc->childNodes as $item)

    if ($item->nodeType == XML_PI_NODE)

        $doc->removeChild($item); // remove hack

$doc->encoding = 'UTF-8'; // insert proper



?>

down

Shane Harter ¶

3 years ago


DOMDocument is very good at dealing with imperfect markup, but it throws warnings all over the place when it does. 



This isn't well documented here. The solution to this is to implement a separate aparatus for dealing with just these errors. 



Set libxml_use_internal_errors(true) before calling loadHTML. This will prevent errors from bubbling up to your default error handler. And you can then get at them (if you desire) using other libxml error functions. 



You can find more info here http://www.php.net/manual/en/ref.libxml.php

down

cake at brothercake dot com ¶

5 months ago


Be aware that this function doesn't actually understand HTML -- it fixes tag-soup input using the general rules of SGML, so it creates well-formed markup, but has no idea which element contexts are allowed.



For example, with input like this where the first element isn't closed: 



    <span>hello <div>world</div>



loadHTML will change it to this, which is well-formed but invalid:



    <span>hello <div>world</div></span>

down

jamesedwardcooke+php at gmail dot com ¶

4 years ago


Using loadHTML() automagically sets the doctype property of your DOMDocument instance(to the doctype in the html, or defaults to 4.0 Transitional). If you set the doctype with DOMImplementation it will be overridden.



I assumed it was possible to set it and then load html with the doctype I defined(in order to decide the doctype at runtime), and ran into a huge headache trying to find out where my doctype was going. Hopefully this helps someone else.

down

romain dot lalaut at laposte dot net ¶

6 years ago


Note that the elements of such document will have no namespace even with <html xmlns="http://www.w3.org/1999/xhtml">

down

xuanbn at yahoo dot com ¶

5 years ago


If you use loadHTML() to process utf HTML string (eg in Vietnamese), you may experience result in garbage text, while some files were OK. Even your HTML already have meta charset  like



  <meta http-equiv="content-type" content="text/html; charset=utf-8">



I have discovered that, to help loadHTML() process utf file correctly, the meta tag should come first, before any utf string appear. For example, this HTML file



<html>

 <head>

    <meta http-equiv="content-type" content="text/html; charset=utf-8">

    <title> Vietnamese - Tiếng Việt</title>

  </head>

<body></body>

</html>



will be OK with loadHTML() when <meta> tag appear <title> tag.



But the file below will not regcornize by loadHTML() because <title> tag contains utf string appear before <meta> tag.



<html>

 <head>

    <title> Vietnamese - Tiếng Việt</title>

    <meta http-equiv="content-type" content="text/html; charset=utf-8">

  </head>

<body></body>

</html>

down

bigtree at DONTSPAM dot 29a dot nl ¶

8 years ago


Pay attention when loading html that has a different charset than iso-8859-1. Since this method does not actively try to figure out what the html you are trying to load is encoded in (like most browsers do), you have to specify it in the html head. If, for instance, your html is in utf-8, make sure you have a meta tag in the html's head section:



<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>

</head>



If you do not specify the charset like this, all high-ascii bytes will be html-encoded. It is not enough to set the dom document you are loading the html in to UTF-8.

down

Alex ¶

3 years ago


Beware of the "gotcha" (works as designed but not as expected): if you use loadHTML, you cannot validate the document. Validation is only for XML. Details here: http://bugs.php.net/bug.php?id=43771&edit=1

down

Errol ¶

4 years ago


It should be noted that when any text is provided within the body tag


outside of a containing element, the DOMDocument will encapsulate that


text into a paragraph tag (<p>).





For example:


<?php


$doc = new DOMDocument();


$doc->loadHTML("<html><body>Test<br><div>Text</div></body></html>");


echo $doc->saveHTML();


?>





will yield:


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"


"http://www.w3.org/TR/REC-html40/loose.dtd">


<html><body>


<p>Test<br></p>


<div>Text</div>


</body></html>





while:


<?php


$doc = new DOMDocument();


$doc->loadHTML(


    "<html><body><i>Test</i><br><div>Text</div></body></html>");


echo $doc->saveHTML();


?>





will yield:


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"


"http://www.w3.org/TR/REC-html40/loose.dtd">


<html><body>


<i>Test</i><br><div>Text</div>


</body></html>

down

hanhvansu at yahoo dot com ¶

6 years ago


When using loadHTML() to process UTF-8 pages, you may meet the problem that the output of dom functions are not like the input. For example, if you want to get "Cạnh tranh", you will receive "Cáº¡nh tranh".  I suggest we use mb_convert_encoding before load UTF-8 page :

<?php

    $pageDom = new DomDocument();    

    $searchPage = mb_convert_encoding($htmlUTF8Page, 'HTML-ENTITIES', "UTF-8"); 

    @$pageDom->loadHTML($htmlUTF8Page);



?>

down

-1

piopier ¶

3 years ago


Here is a function I wrote to capitalize the previous remarks about charset problems (UTF-8...) when using loadHTML and then DOM functions.

It adds the charset meta tag just after <head> to improve automatic encoding detection, converts any specific character to an html entity, thus PHP DOM functions/attributes will return correct values.



<?php

mb_detect_order("ASCII,UTF-8,ISO-8859-1,windows-1252,iso-8859-15");

function loadNprepare($url,$encod='') {

        $content        = file_get_contents($url);

        if (!empty($content)) {

                if (empty($encod))

                        $encod  = mb_detect_encoding($content);

                $headpos        = mb_strpos($content,'<head>');

                if (FALSE=== $headpos)

                        $headpos= mb_strpos($content,'<HEAD>');

                if (FALSE!== $headpos) {

                        $headpos+=6;

                        $content = mb_substr($content,0,$headpos) . '<meta http-equiv="Content-Type" content="text/html; charset='.$encod.'">' .mb_substr($content,$headpos);

                }

                $content=mb_convert_encoding($content, 'HTML-ENTITIES', $encod);

        }

        $dom = new DomDocument;

        $res = $dom->loadHTML($content);

        if (!$res) return FALSE;

        return $dom;

}

?>



NB: it uses mb_strpos/mb_substr instead of mb_ereg_replace because that seemed more efficient with huge html pages.

add a note