How can I interpret my own tags in PHP like in joomla?
This is a part of a joomla template file:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="<?php echo $this->language; ?>" lang="<?php echo $this->language; ?>">
<head>
<jdoc:include type="head" />
<?php JHTML::_('behavior.mootools'); ?>