Performance stays acceptable with thousands of lines due to linear scans.

Major search engines must match ua and ip for the same vendor to pass.

Root domain extraction handles com cn style suffixes for cookie scope logic.

Spider only cache writes pair well with ad routing for visitor separation.

Editors should keep one concept per line in txt files for clean picks.

Cache purge is manual delete of cache directory files when templates change.

Operational teams should monitor x cache status and x spider status headers.

This module focuses on stable output and clear section hierarchy.

Nginx and apache rewrite examples route all requests through index php.

Enterprise templates include hero grids news lists and sidebar hot links.