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php$" exclude="^_" />
This parameter, named 'layout', generates a list of items based on the template files.
It includes PHP files and excludes files with names that start with an underscore.
The list of items is displayed without the file extensions, and the values are saved
without the file extensions.
Imagine the tmpl folder contains the files: default.php, horiz.php, index.html,
vert.php, and _item.php. This is what the parameter would appear like when
rendered as a form element:
To use this parameter to render a template we can use the following; note that if the
parameter is not defined we use the layout 'default':
$layout = $params->get('layout', 'default');
require(JModuleHelper::getLayoutPath('mod_myextension', $layout));
We mentioned earlier the possibility of using a bespoke module error layout if
anything were to go amiss during the execution of our module. We can use the
JError class to define an error. Joomla! uses this class to describe errors, and objects
of this type are often returned from methods when errors occur.


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