dwisetiyadi/CodeIgniter-PHP-QR-Code — pull request #2 by JaredHatfield (2012-05-06 00:51:11+00:00)
Title: Allow level and size to be specified even if the savename is not specified.

Based on the underlying method that is being called, the $outfile parameter is optional and therefore a null value can be used to allow the level and size to be specified without requiring the savename.