Mod_rewrite is apaches most powerful and mystifying module. The basics are introduced and some practical uses are covered.

Get your Comptia Net+ certification with this study guide. Network topologies, protocols, services, devices and the OSI model are all covered. Learn IP addressing schemes and basic subnets.

Use javascript to validate form fields. By checking values with javascript prior to submitting forms to your server you can cut down on server load. Topics covered include retrieving the values of form fields, validating email addresses, and using regular expression testing to validate forms.