Codeigniter no input file specified error

Your uri_protocol needs to be set to something - at least set it to auto.

The error you are getting is because PHP runs as CGI which means you need to pass the URL rewrite to index.php?/$1 instead (note the question mark).

Godaddy hosting, it seems fixed on.htaccess, myself it is working by changing:

RewriteRule ^(.*)$ index.php/$1 [L]

to

RewriteRule ^(.*)$ index.php?/$1 [QSA,L]

Your $config['uri_protocol'] should not be empty. The default is AUTO, passing in an empty string will break the core URI class, which is used to route your requests through the Router class.

/*|--------------------------------------------------------------------------| URI PROTOCOL|--------------------------------------------------------------------------|| This item determines which server global should be used to retrieve the| URI string.  The default setting of 'AUTO' works for most servers.| If your links do not seem to work, try one of the other delicious flavors:|| 'AUTO'            Default - auto detects| 'PATH_INFO'       Uses the PATH_INFO| 'QUERY_STRING'    Uses the QUERY_STRING| 'REQUEST_URI'     Uses the REQUEST_URI| 'ORIG_PATH_INFO'  Uses the ORIG_PATH_INFO|*/$config['uri_protocol'] = 'AUTO';

As the comments say: "If your links do not seem to work, try one of the other delicious flavors".
Empty string is not one of those flavors, it would end up trying to read from $_SERVER[''], which is normally going to be empty.