Apache Rewriting hide extensions

Maybe just a tricky question,

But for my website, I use to hide files extensions in url using this line in my .htaccess :

RewriteEngine On
RewriteRule ^(.+)/$ $1.php [L]

It worked perfectly on my mutualized server, but not in local with MAMP. But it was not a big deal.

But now I've chosen a dedicated server, and I'm having the real problem, not working on it. It's strange because other rewriting rules like:

RewriteEngine On
RewriteRule ^([a-zA-Z0-9_]+)$ place.php?place=$1 [L]
RewriteRule ^([a-zA-Z0-9_]+)/$ place.php?place=$1 [L]

are perfectly working!!

Is there a specific configuration to be made in some Apache file in order to have this thing working?

Thanx a lot for your time

Guillaume

EDIT : More of my .htaccess :

RewriteEngine On

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

RewriteRule ^fullscreen-([a-zA-Z0-9_]+)$ place.php?place=$1 [L]
RewriteRule ^fullscreen-([a-zA-Z0-9_]+)/$ place.php?place=$1 [L]
RewriteRule ^fullscreen-([a-zA-Z0-9_]+)-([a-zA-Z0-9_]+)$ fullscreen.php?place=$1&event=$2 [L]
RewriteRule ^fullscreen-([a-zA-Z0-9_]+)-([a-zA-Z0-9_]+)/$ fullscreen.php?place=$1&event=$2 [L]
RewriteRule ^fullscreen-([a-zA-Z0-9_]+)-([a-zA-Z0-9_]+)-([a-zA-Z0-9_]+)$ fullscreen.php?place=$1&event=$2&sort=$3 [L]
RewriteRule ^fullscreen-([a-zA-Z0-9_]+)-([a-zA-Z0-9_]+)-([a-zA-Z0-9_]+)/$ fullscreen.php?place=$1&event=开发者_StackOverflow$2&sort=$3 [L]

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check for the mod_rewrite if it is enable with php by doing

echo phpinfo();

so you have to enable mod_rewrite in httpd.conf file

1. Find the httpd.conf file (usually you will find it in a folder called conf, config or something along those lines) if you have LAMP platform file can be found here /etc/httpd/conf/httpd.conf
2. Inside the httpd.conf file uncomment the line LoadModule rewrite_module modules/mod_rewrite.so (remove the pound '#' sign from in front of the line)
3. Also find the line ClearModuleList is uncommented then find and make sure that the line AddModule mod_rewrite.c is not commented out.

http://www.tutorio.com/tutorial/enable-mod-rewrite-on-apache

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enabled overriding ( AllowOverride All ) in your httpd.conf

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Needed That:

Options +FollowSymlinks
Options +MultiViews