Zend::loadInterface() works exactly the same as Zend::loadClass(), only it loads an interface instead.

<?php
	
loadInterface($interface, $dirs)

?>

The Zend::loadClass() method cannot be used for loading interfaces because the PHP function class_exists() does cannot check for interfaces (since PHP 5.0.2). Use Zend::loadInterface() instead.

If you ask for an interface with underscores in the name, and $dirs is null (the default), Zend::loadInterface() will auto-discover the $dirs from the interface name by converting underscores to directory separators. For example, if $interface is Zend_Example_Interface, that will map to a path of Zend/Example/Interface.php.