<?php

class Publication 
{

// Squirly brakcet defines scope
// everything inbetween the "{" and "}"
// belongs to the class

	// declare the "class" "state" variables
	// visibility can be "protected" "public" or "private"

	public	$ad_id 
	
	// each "state" varible should have
	// "Accessor/Mutator" "methods"

	// Mutator here
	public function Set_pub_id($value)
	{
		$this->pub_id = $value;
	}

	// Accessor here
	public function Get_pub_id()
	{ 
		return $this->pub_id ;
	}

	// class function
	
	public function DisplayPublication
	{
		// do stuff here
	}
}