Question

Possible Duplicate:
Access variable in class

I’m building some caching functionality for a class and would like a “class-global” array, i.e. an array that is the same in all instances but not constant. How can this be done?

Answer 1

Your solution is a static variable!

<?php
// ...
class Foo {
  public static $array;


  public static function addValue($key, $value) {
    self::$array[$key] = $value;
  }

  public static function getArrayKey($key) {
    if(isset(self::$array[$key])) {
      return self::$array[$key];
    }
  }
}

Foo::addValue('foo', 'bar');
echo(Foo::getArrayKey('foo'));
// ...
?>