Replace underscores in URLs with hyphens using Apache .htaccess.
CURL Guide for sending POST data form request with PHP and CURL
Time-dependant rewriting uses mod_rewrite and apache server time variables to display different files depending on the time, while the URL stays the same. An often requested implementation of this is to display a different home page or image depending on if its morning, noon, or night.
Securing Subdirectories using unique apache htaccess solutions.
- When php run as Apache Module (mod_php)
- When php run as CGI
- When cgi?d php is run with wrapper (for FastCGI)
Fighting Blog Spam with Apache htaccess and other methods.
This explains the basic methods to get started caching with php headers