I just came through a scenario regarding joomla website.
The scenario is:
Data in URL is passed to Joomla website and from the URL Joomla must store the data into the database.
Is this possible in Joomla?
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You can get the value of a URL parameter with:
$value = JFactory::getApplication()->input->get('parameter');
Then you can use
JDatabaseQuery to insert data into the database.
You will need to develop a system plugin for that. The system plugin will grab the URL, parses the data that you need, and then store it in a table of your choice.