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.