static function xml($name, $value = null)
{
if (is_null($value)) {
self::assert($name);
($xtree = @unserialize($_SESSION[$name])) !== false and $xtree instanceof xtree or runtime_error('Session fetched variable is not an XML: ' . $name);
return $xtree->xml();
} else {
self::assert();
$value instanceof xml or runtime_error('Session stored variable is not an XML: ' . $name);
$_SESSION[$name] = serialize(xtree::create($value));
}
}
function load($filename)
{
$this->xml = xml::load($filename);
$query = array();
foreach (self::$languages as $language) {
$query[] = "/local//{$language}";
}
foreach ($this->xml->query(implode('|', $query)) as $node) {
$doc = new xml();
foreach ($this->xml->query('* | text()', $node) as $piece) {
$doc->append($doc->import($piece));
}
$path = explode(':', str_replace('/', ':', trim($node->path(), '/')));
array_shift($path);
$this->local[implode(':', $path)] = xtree::create($doc);
}
}