$this->
appendByRef($tpl_var,
$value,
$merge);
} /**
* clear the given assigned template variable.
*
* @param string $tpl_var the template variable to clear
*/
public function clear_assign($tpl_var) { $this->
clearAssign($tpl_var);
} /**
* Registers custom function to be used in templates
*
* @param string $function the name of the template function
* @param string $function_impl the name of the PHP function to register
* @param bool $cacheable
* @param mixed $cache_attrs
*/
public function register_function($function,
$function_impl,
$cacheable=true,
$cache_attrs=null
) {