@armanP's accepted answer above does not remove .php extension from php urls. It just makes it possible to access php files without using .php at the end. For example /file.php can be accessed using /file or /file.php but this way you have 2 diffrent urls pointing to the same location.
If you want to remove .php completely, you can use the following rules in /.htaccess :
RewriteEngine on
#redirect /file.php to /file
RewriteCond %{THE_REQUEST} \s/([^.]+)\.php [NC]
RewriteRule ^ /%1 [NE,L,R]
# now we will internally map /file to /file.php
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*)/?$ /$1.php [L]
To remove .html ,use this
RewriteEngine on
#redirect /file.html to /file
RewriteCond %{THE_REQUEST} \s/([^.]+)\.html [NC]
RewriteRule ^ /%1 [NE,L,R]
# now we will internally map /file to/ file.html
RewriteCond %{REQUEST_FILENAME}.html -f
RewriteRule ^(.*)/?$ /$1.html [L]
Solution for Apache 2.4* users :
If your apache version is 2.4 ,you can use the Code without RewriteConditions On Apache 2.4 we can use END flag instead of the RewriteCond to prevent Infinite loop error.
Here is a solution for Apache 2.4 users
RewriteEngine on
#redirect /file.php to /file
RewriteRule ^(.+).php$ /$1 [L,R]
# now we will internally map /file to /file.php
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*)/?$ /$1.php [END]
Note : If your external stylesheet or images
aren't loading after adding these rules ,to fix this you can either make your links absolute changing <img src="foo.png> to <img src="/foo.png> .Notice the / before the filename . or change the URI base add the following to head section of your Web page <base href="/"> .
Your Webpage fails to load css and js due to the following reason :
When your browser url changes from /file.php to /file server thinks that /file is a directory and it tries to append that in front of all relative paths . For example : when your url is http://example.com/file/ your relative path changes to <img src "/file/foo.png"> thus the image fails to load . You can use one of the solutions I mentioned in the last peragraph to solve this issue.