Apache config:
RewriteEngine On
Options -Indexes
Options +FollowSymLinks
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*)$ $1.php [NC,L]
ErrorDocument 500 D:/Error/500.html
ErrorDocument 404 D:/Error/404.html
ErrorDocument 403 D:/Error/403.html
Burada bir yanlışlık var ise söyler misiniz?