RewriteEngine On

# Existing file or directory ho to rewrite na kare
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

# Agar .php file exist karti ho to usko load karo
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.+?)/?$ $1.php [L]