hidden php extensions

Privet Vsem.Mne skazali chto dlja SEO luche skrit .php rashrenii, (naskolko eto pravda?)developer.am/announce/tak vot sozdal folder i tam pomestil index.php file, rabotayet. (naskolo eto xarasho?)teper xochu i nim spsosbom rishit etot vapros s pomushju .htaccess filekatori soderjit sledushiRewriteEngine onRewriteCond %{REQUEST_FILENAME} !-dRewriteCond %{REQUEST_FILENAME}\.php -fRewriteRule ^(.*)$ $1.phpno server dajot sledushi oshibku Internal Server Errorpojalusta podskajite kakoi spsosb lutche, gde ja oshibajus, est drugoi resheneija?spasibo