Convert HTML entities to XML entities - optionally coverts special characters

gistfile1.php

function xmlEntities($string, $specialchars = false) {
	$translationTable = get_html_translation_table(HTML_ENTITIES, ENT_QUOTES);
	
	foreach ($translationTable as $char => $entity) {
		$from[] = $entity;
		$to[] = '&#'.ord($char).';';
	}
	//convert special characters &, ", ', <, > to html entities
	if ($specialchars) {
		$string = htmlspecialchars($string);
	}
	//convert html entities to XML entities
	return str_replace($from, $to, $string);		
}