Site : http://alexandre.alapetite.fr/doc-alex/domxml-php4-php5

This library is used by php-pear-CAS.

Installation:

yum --enablerepo=remi install php-domxml-php4-php5

Use:

if (version_compare(PHP_VERSION, '5', '>=')) {
        require_once('domxml-php4-php5/domxml-php4-to-php5.php');
}