DomDocument class Error

[samuelmano]

How to apply xslt for xml file in linux(redhat 4ES)
In windows i have used wamp. In that by using
DomDocument Class i have done it.
But in Redhat if i place the same code means its displaying
Fatal error: Cannot instantiate non-existent class: domdocument

Help me

[MarkR]

What version of PHP are you using? Is it one where DOMDocument even exists?

Use the same version of PHP on dev and production - then you will have no problems.

Mark

[samuelmano]

I am using PHP 4.4.4
It is built in with redhat.
How to check whether DOMDocument exists or not

[Installer]

class_exists()

[samuelmano]

In windows, by using wamp just i have written following code . But its working

<?php
echo "Hai1";
$xsl = new DomDocument();
echo "Hai2";
$xml = new DomDocument();
$xsl->load("samplecom.xsl");
$xml->load("summaryview.xml");

$proc = new XsltProcessor();
$proc->registerPhpFunctions();

// Load the documents and process using $xslt
$xsl = $proc->importStylesheet($xsl);

// transform and output the xml document
$newdom = $proc->transformToDoc($xml);
echo "Hai";
print $newdom->saveXML();
?>

If i try the same code in linux means it display following error message

Hai1
Fatal error: Cannot instantiate non-existent class: domdocument in /foaf/sample/sample2.php on line 3

It doesn't execute Hai2 itself.
How to rectify this error please help me