<?php 
function messWithTags {
    $this->Tag->push(array('Tag'=>array('name'=>'data structure')));
    $this->Tag->push(array('Tag'=>array('name'=>'boredom')));
    // prints 'boredom' tag
    pr($this->Tag->top());
    // prints and delete 'boredom' tag
    pr($this->Tag->pop());
    $this->Tag->push(array('Tag'=>array('name'=>'exciting')));
    // prints and deletes 'exciting' tag
    pr($this->Tag->pop());
    // prints 1
    pr($this->Tag->length());
    // finally empties out the stack, deleting and printing the 'data structure' tag
    pr($this->Tag->pop());
    // prints 0
    pr($this->Tag->length());
}
?>