.htaccess issue | Codeigniter - .htaccess

Question

I'm relatively new to Codeigniter and MVC. But, have successfully made two apps 'Locally'. While exploring, I found a way to remove 'Index.php' from the URL and also about custom routes. The .htaccess file that i have works like charm locally, but when trying to host it; there is a issue 505 internal server issue
Here is the first .htaccess code that i have (works locally) :-
<IfModule mod_rewrite.c>
# Turn on URL rewriting
RewriteEngine On
# If your website begins from a folder e.g localhost/my_project then
# you have to change it to: RewriteBase /my_project/
# If your site begins from the root e.g. example.local/ then
# let it as it is
RewriteBase /
# Protect application and system files from being viewed when the index.php is missing
RewriteCond $1 ^(application|system|private|logs)
# Rewrite to index.php/access_denied/URL
RewriteRule ^(.*)$ index.php/access_denied/$1 [PT,L]
# Allow these directories and files to be displayed directly:
RewriteCond $1 ^(index\.php|robots\.txt|favicon\.ico|public|assets|css|js|images)
# No rewriting
RewriteRule ^(.*)$ - [PT,L]
# Rewrite to index.php/URL
RewriteRule ^(.*)$ index.php/$1 [PT,L]
</IfModule>
When i use the code above there is an error. And, the app works only when .htaccess is removed. (I then have to use the inconvenient long URLs)
After a brief research and using different .htaccess without success, i asked one of my friends who has a Hosted CI app successfully running. He sends me a file which leads me the landing page without any problem; but, cant call any functions with/without using routing .i.e. If i use the custom routed URl (www.mySite.com/contact) then also it leads me to the landing page, the same with actual URL scheme (www.mySite.com/welcome/contact_page)
The new code here:-
<IfModule mod_rewrite.c>
RewriteEngine On
# !IMPORTANT! Set your RewriteBase here and don't forget trailing and leading
# slashes.
# If your page resides at
# http://www.example.com/mypage/test1
# then use
# RewriteBase /mypage/test1/
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
<IfModule !mod_rewrite.c>
ErrorDocument 404 /index.php
</IfModule>
Using this code shows me the landing page but i cannot navigate any further from there. When i try to call a function the landing page reloads. This, I think is because of the last error Handling Code (ErrorDocument 404 /index.php)
Does anyone know what the solution the problem might be??
questions
Why doesnt the first .htaccess code work when hosted?
What may be the issue with the second available .htaccess file??
Do you guys have better .htaccess file? If yes, can you post it here??

Answer 1

Try this .htaccess (Codeigniter Recommended )
RewriteEngine on
RewriteCond $1 !^(index\.php|assets|image|resources|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L,QSA]
or
RewriteEngine on
RewriteCond $1 !^(index\.php|resources|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L,QSA]
In application/config/config.php
$config['base_url'] = 'http://stackoverflow.com/';
$config['index_page'] = ''; # Should be empty
And make sure Controller name, Model names are in proper way. Bcz Linux Host is an Case-Sensitive.