Stack class

class Stack
{
  public $stack = array();
 
  public function add($item)
  {
    $this->stack[] = $item;
    return $this;
  }
  public function next()
  {
    return array_pop($this->stack);
  }
  public function count()
  {
    return ($c = count($this->stack) >= 1) ? $c : 0;
  }
  public function contains($item, $strict=false)
  {
    return in_array($item, $this->stack, $strict) ? true : false;
  }
  public function __get($fn)
  {
    return $this->$fn();
  }
}
 
// EXAMPLE
 
$stack = new Stack();
 
$stack->add('apples')
      ->add('oranges')
      ->add('pears')
      ->add('strawberries');
 
echo '<pre>', print_r($stack), "\n\n";
 
while ($x = $stack->next)
{
  echo '$stack->next: "', $x, "\"\n";
}
echo '</pre>';