New Extensions

The following are new extensions added (by default)
as of PHP 5.2.0:

• Filter – validates and filters
  data, and is designed for use with insecure data such as user
  input. This extension is enabled by default; the default mode RAW
  does not impact input data in any way.
• JSON – implements the JavaScript Object Notation
  (JSON) data interchange format. This extension is enabled by
  default.
• Zip – enables you to transparently read or write
  ZIP compressed archives and the files inside them.