RewriteEngine On

# Block common bad bots by User-Agent
SetEnvIfNoCase User-Agent "MJ12bot" bad_bot
SetEnvIfNoCase User-Agent "AhrefsBot" bad_bot
SetEnvIfNoCase User-Agent "SemrushBot" bad_bot
SetEnvIfNoCase User-Agent "Baiduspider" bad_bot
SetEnvIfNoCase User-Agent "DotBot" bad_bot
SetEnvIfNoCase User-Agent "Sogou" bad_bot
SetEnvIfNoCase User-Agent "PetalBot" bad_bot
SetEnvIfNoCase User-Agent "Yandex" bad_bot
SetEnvIfNoCase User-Agent "python-requests" bad_bot
SetEnvIfNoCase User-Agent "curl" bad_bot
SetEnvIfNoCase User-Agent "wget" bad_bot

# Block requests with empty User-Agent (often bots)
SetEnvIf User-Agent "^$" bad_bot

# Redirect bad bots to Wikipedia
Order Allow,Deny
Allow from all
Deny from env=bad_bot
ErrorDocument 403 https://en.wikipedia.org/

# Optional: Block spammy referrers
SetEnvIfNoCase Referer "100dollars-seo|free-share-buttons|ranksonic" bad_ref
Deny from env=bad_ref

# Rewrite all other requests to index.php if not a file or directory
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule (.*) index.php?cl=$1 [QSA]