Get optional parameters from custom module - joomla

Question

I am creating custom module (I am learning how to make custom modules), and at the moment I have problem how to get custom parameters. This is XML part, for defining custom parameter:
<config>
<fields name="params">
<fieldset name="email_settings" label="Email Setting">
<field name="email_receiver" type="text" default=""
label="Receiver Email" />
</fieldset>
</fields>
</config>
This is helper file:
class modAskUsFormHelper
{
public static function sendEmail($data)
{
$mailer = JFactory::getMailer();
}
public static function getAjax()
{
$data = modAskUsFormHelper::cleanData();
modAskUsFormHelper::sendEmail($data);
}
public static function cleanData()
{
$input = JFactory::getApplication()->input;
$data = array(
'name' => $input->get('ime', '', 'string'),
'email' => $input->get('email', '', 'string'),
'tema' => $input->get('tema', '', 'string'),
'pitanje' => $input->get('pitanje', '', 'string')
);
return $data;
}
}
When I try var_dump($this->params->get('email_receiver')); I get following error:
Fatal error: Using $this when not in object context in C:\wamp\www\joomla\modules\mod_ask_us_form\helper.php on line 21
Where is the problem?

Answer 1

Calling parameters in the helper.php is a little different to what you would normally use. You would achieve it like so:
public static function getParams($instance = 'mod_your_module'){ // replace mod_your_module
jimport('joomla.application.module.helper');
$module = JModuleHelper::getModule($instance);
$moduleParams = new JRegistry;
$moduleParams->loadString($module->params);
return $moduleParams;
}
Then to call then in another function, simply use the folowing:
$params = static::getParams($instance);
$displayName = $params->get('email_receiver');
Hope this helps

Answer 2

for component you can get config options by following the method below:
jimport('joomla.application.component.helper');
$isEnableMap = JComponentHelper::getParams('com_mycomponent')->get('enable_map');
var_dump($isEnableMap);exit;