I have one codeigniter app which was working fine on localhost. When I uploaded the same on server, it shows blank page & returning no error. I have also used approx. al
I had the same issue Apparently firefox doesn't show any errors (blank page) but chrome shows error 500.
To fix it you need to install php's fileinto extention (extension=php_fileinfo.dll)
Search based on your OS to see how to do it.
I am using XAMPP in windows 7 - I did it as follows :
1-go to xampp/php/php.ini 2-change ;php_fileinfo.dll to php_fileinfo.dll 3-save the file 4-restart apache from xampp control