Pretty basic stuff. That constant in app_config.php you defined, SITE_ROOT, comes
in handy. Using it, you can define a directory in which you want to save uploaded
files. Go ahead and create that directory on your web server, using a Terminal,
command-line tool, or your FTP program. So if your SITE_ROOT is just /, then create
/uploads/profile_pics. If your SITE_ROOT is yellowtagmedia_com/phpMM, you’d
create yellowtagmedia_com/phpMM/uploads/profile_pics.
Now, you need to add an array of potential errors, like this: