Topics

Getting onto Yardley

• Set your passwords on the Linux side of the GLUW lab so that Fife won't hunt you down.
• Fife will run a password cracker, and he will ban you from yardley if your password stinks.

By the Way...

• isset() for detecting HTTP parameters
• unset() to unset variables and array elements
• print_r() to recursively print any object (for debugging)

PHP Arrays

• Technically: an array is an "ordered map"
• array() language construct
• keys must be integers or strings
• [] syntax
• foreach loop

Abstraction

• It's magic!
• Allows you to ignore many (interesting) details.
• Examples: Frens's view of networks; PHP sessions.

Sessions

• Important PHP code toggle
  • session_start() required on each page to access session
  • $_SESSION superglobal
• Session id can be passed in a cookie or in the URL.
• Best practices toggle
  • Session abstraction allows the system to store the sessions anywhere: in cookies, on the filesystem, in a database.
  • Store minimal data to lookup in your database.

Security

• Enter a name that would cause problems.
• htmlspecialchars()