public function __toString()
{
$parent_string = parent::__toString();
$output = array();
$output[] = sprintf("<TimeSpan%s>", isset($this->id) ? sprintf(" id=\"%s\"", $this->id) : "");
$output[] = $parent_string;
$output[] = "</TimeSpan>";
return implode("\n", $output);
}
public function __toString()
{
$parent_string = parent::__toString();
$output = array();
if (isset($this->when)) {
$output[] = sprintf("<TimeStamp%s>", isset($this->id) ? sprintf(" id=\"%s\"", $this->id) : "");
$output[] = $parent_string;
$output[] = $this->when->__toString();
$output[] = "</TimeStamp>";
}
return implode("\n", $output);
}