Upload Path invalid on upload

I suggest building the upload path like this

PHP Code:

$config['upload_path'] = FCPATH . 'assets/images/'; 


FCPATH is the path to the folder where CI's index.php is found.

An alternate way to build the path is this.

PHP Code:

$config['upload_path'] = str_replace('application', 'assets/images', APPPATH); 


I don't think either one is clearly superior, but the first is the simplest. That's good, right?

jrekland's answer works too, but be aware that it won't include a trailing slash because realpath() removes trailing delimiters. I cannot remember if a trailing slash is important in this use-case or not.