Joomla 3.9.19 get the constants from global configuration in component display function

Question

I have created a component and need to get a constant value in the component administrator and list the item according to it. I have tried different ways to get the constant value in the display() function in 'view.html.php'. I am expecting the value will be available in the default.php with $this.

I have defined the constant in the configuration.php file, a URL is supposed to be define.

define('CONSTANTVALUE', 'the URL string');

in the display() function,

$config = JFactory::getConfig();
$constantvalue = $config->get('CONSTANTVALUE');
$this->constantvalue=  $constantvalue;

Seems this is not working. Then, I have tried:

JFactory::getApplication()->get('CONSTANTVALUE');

That is also not working.

I have referred to this thread, https://stackoverflow.com/questions/21702981/joomla-3-how-to-get-value-from-configuration-file

How can I get the constant from configuration to component view file?

Answer 1

So to get it from global configuration set in configuration.php from anywhere within Joomla component, plugins, modules and templates you would use:

$config   = JFactory::getConfig();
$siteName = $config->get('sitename', 'No Site Name Specified');

OR

$siteName  = JFactory::getConfig()->get('sitename', 'No Site Name Specified');

You can also use name spacing in preparation for Joomla 4 with the following:

define

use Joomla\CMS\Factory;

before the class opening.

$globalConfig = Factory::getConfig();
$siteName     = $globalConfig->get('sitename', 'No Site Name Specified'); 

Noting the 'sitename' might be case sensitive.