php - How to you get hold of the user defined $tmp_path folder in Joomla -

I want to create some files in my component and then want to delete them. How was the $ tmp_path variable defined by the user in the config.php file?

$ config = & amp; JFactory :: getConfig ();

$ tmp_path = $ config-> getValue ('config.tmp_path');

The API document for Joomla! Very useful: