PHP 5.6.0 released

DOMDocument::saveHTML

(PHP 5)

DOMDocument::saveHTML Dumps the internal document into a string using HTML formatting

Descrierea

public string DOMDocument::saveHTML ([ DOMNode $node = NULL ] )

Creates an HTML document from the DOM representation. This function is usually called after building a new dom document from scratch as in the example below.

Parametri

node

Optional parameter to output a subset of the document.

Valorile întoarse

Returns the HTML, or FALSE if an error occurred.

Istoria schimbărilor

Versiunea Descriere
5.3.6 The node parameter was added.

Exemple

Example #1 Saving a HTML tree into a string

<?php

$doc 
= new DOMDocument('1.0');

$root $doc->createElement('html');
$root $doc->appendChild($root);

$head $doc->createElement('head');
$head $root->appendChild($head);

$title $doc->createElement('title');
$title $head->appendChild($title);

$text $doc->createTextNode('This is the title');
$text $title->appendChild($text);

echo 
$doc->saveHTML();

?>

Vedeți de asemenea

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User Contributed Notes 11 notes

up
10
m at hbblogs daught calm
6 years ago
This method, as of 5.2.6, will automatically add <html><body> and <!DOCTYPE> tags to the document if they are missing, without asking whether you want them. In my application, I needed to use the DOM methods to manipulate just a fragment of html, so these tags were rather unhelpful.

Here's a simple hack to remove them in case, like me, all you wanted to do was perform a few operations on an HTML fragment.

$html_fragment = preg_replace('/^<!DOCTYPE.+?>/', '', str_replace( array('<html>', '</html>', '<body>', '</body>'), array('', '', '', ''), $dom->saveHTML()));
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4
alvaro at demogracia dot com
3 years ago
Since PHP/5.3.6, DOMDocument->saveHTML() accepts an optional DOMNode parameter similarly to DOMDocument->saveXML():

http://bugs.php.net/bug.php?id=39771
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3
Anonymous
4 years ago
If you want a simpler way to get around the <script> tag problem try:

<?php

  $script
= $doc->createElement ('script');\
 
// Creating an empty text node forces <script></script>
 
$script->appendChild ($doc->createTextNode (''));
 
$head->appendChild ($script);

?>
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5
Bart Feenstra
5 years ago
I am using this solution to prevent tags and the doctype from being added to the HTML string automatically:

<?php
$html
= '<h1>Hello world!</h1>';
$html = '<div>' . $html . '</div>';
$doc = new DOMDocument;
$doc->loadHTML($html);
echo
substr($doc->saveXML($doc->getElementsByTagName('div')->item(0)), 5, -6)

// Outputs: "<h1>Hello world!</h1>"
?>
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0
Yajo
3 years ago
Another way to workaround the <script/> problem is putting a semicolon (;) inside the script element.
up
0
Anonymous
5 years ago
To avoid script tags from being output as <script />, you can use the DOMDocumentFragment class:

<?php

$doc
= new DOMDocument();
$doc -> loadXML($xmlstring);
$fragment = $doc->createDocumentFragment();
/* Append the script element to the fragment using raw XML strings (will be preserved in their raw form) and if succesful proceed to insert it in the DOM tree */
if($fragment->appendXML("<script type='text/javascript' src='$source'></script>") {
 
$xpath = new DOMXpath($doc);
 
$resultlist = $xpath->query("//*[local-name() = 'html']/*[local-name() = 'head']"); /* namespace-safe method to find all head elements which are childs of the html element, should only return 1 match */
 
foreach($resultlist as $headnode// insert the script tag
    
$headnode->appendChild($fragment);
}
$doc->saveXML(); /* and our script tags will still be <script></script> */

?>
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0
Anonymous
6 years ago
<?php
function getDOMString($retNode) {
  if (!
$retNode) return null;
 
$retval = strtr($retNode-->ownerDocument->saveXML($retNode),
  array(
   
'></area>' => ' />',
   
'></base>' => ' />',
   
'></basefont>' => ' />',
   
'></br>' => ' />',
   
'></col>' => ' />',
   
'></frame>' => ' />',
   
'></hr>' => ' />',
   
'></img>' => ' />',
   
'></input>' => ' />',
   
'></isindex>' => ' />',
   
'></link>' => ' />',
   
'></meta>' => ' />',
   
'></param>' => ' />',
   
'default:' => '',
   
// sometimes, you have to decode entities too...
   
'&quot;' => '&#34;',
   
'&amp;' =>  '&#38;',
   
'&apos;' => '&#39;',
   
'&lt;' =>   '&#60;',
   
'&gt;' =>   '&#62;',
   
'&nbsp;' => '&#160;',
   
'&copy;' => '&#169;',
   
'&laquo;' => '&#171;',
   
'&reg;' =>   '&#174;',
   
'&raquo;' => '&#187;',
   
'&trade;' => '&#8482;'
 
));
  return
$retval;
}
?>
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0
mjaque at ilkebenson dot com
6 years ago
DOMDocument->saveXML() doesn't generate a proper XHTML format either.

There is a problem with "script" empty elements. For example:

This will be the code generated by saveXML, with an empty script tag.

<html>
  <head>
    <script type="text/JavaScript" src="myScript.js"/>
  </head>
  <body>
    <p>I will not appear</p>
    <script type="text/JavaScript">
    alert("Not working");
    </script>
  </body>
</html>

I don't know if this is valid XHTML (W3C Validator doesn't complain), but both FF 2.0 and IE 6 will not render it properly. Both will use </script> as the closing tag for the first script causing js errors and ignoring in between elements.

You can post-process saveXML string in order to close empty tags with the following function:

<?php
   
function cerrarTag($tag, $xml){
       
$indice = 0;
        while (
$indice< strlen($xml)){
           
$pos = strpos($xml, "<$tag ", $indice);
            if (
$pos){
               
$posCierre = strpos($xml, ">", $pos);
                if (
$xml[$posCierre-1] == "/"){
                   
$xml = substr_replace($xml, "></$tag>", $posCierre-1, 2);
                }
               
$indice = $posCierre;
            }
            else break;
        }
        return
$xml;
    }
?>

At least script and select empty elements should be closed. This example shows how it can be used:

<?php
    define
("CABECERA_XHTML", '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">');

 
$xhtml = $docXML->saveXML($docXML->documentElement);
 
$xhtml = cerrarTag("script", $xhtml);
 
$xhtml = cerrarTag("select", $xhtml);
 
$xhtml = CABECERA_XHTML."\n".$xhtml;
  echo
$xhtml;
?>
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0
archanglmr at yahoo dot com
6 years ago
If created your DOMDocument object using loadHTML() (where the source is from another site) and want to pass your changes back to the browser you should make sure the HTTP Content-Type header matches your meta content-type tags value because modern browsers seem to ignore the meta tag and trust just the HTTP header. For example if you're reading an ISO-8859-1 document and your web server is claiming UTF-8 you need to correct it using the header() function.

<?php
header
('Content-Type: text/html; charset=iso-8859-1');
?>
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0
xoplqox
6 years ago
XHTML:

If the output is XHTML use the function saveXML().

Output example for saveHTML:

<select name="pet" size="3" multiple>
    <option selected>mouse</option>
    <option>bird</option>
    <option>cat</option>
</select>

XHTML conform output using saveXML:

<select name="pet" size="3" multiple="multiple">
    <option selected="selected">mouse</option>
    <option>bird</option>
    <option>cat</option>
</select>
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0
tyson at clugg dot net
9 years ago
<?php
// Using DOM to fix sloppy HTML.
// An example by Tyson Clugg <tyson@clugg.net>
//
// vim: syntax=php expandtab tabstop=2

function tidyHTML($buffer)
{
 
// load our document into a DOM object
 
$dom = @DOMDocument::loadHTML($buffer);
 
// we want nice output
 
$dom->formatOutput = true;
  return(
$dom->saveHTML());
}

// start output buffering, using our nice
// callback funtion to format the output.
ob_start("tidyHTML");

?>
<html>
<p>It's like comparing apples to oranges.
</html>
<?php

// this will be called implicitly, but we'll
// call it manually to illustrate the point.
ob_end_flush();

?>

The above code takes out sloppy HTML:
<html>
<p>It's like comparing apples to oranges.
</html>

And cleans it up to the following:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html><body><p>It's like comparing apples to oranges.
</p></body></html>
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