Create a class variable in extension?

Hello, 1. I have been able to create a class within my extension, but am unable to create a class variable that can be used throughout the class methods. This class variable needs to be an array. Below is how I would write the class in php. class foo { var $foo = array(); functions... } 2. How can you create a constructor for your class in an extension that loads when somebody calls $var = new foo();? Below is what I mean in php classes: class foo {

       function foo() {
               ...
       }

} Thanks for any help, Daniel Simser phpdev@techmeridian.com