<?php

	/*
     * A true singleton in PHP
     * @author Sourav Ray
     * @version 1.0.0
     * @name singletone.class
     */


	class sTonClass 
	{
		var $obj=array();
		static $TheInstance;
		
		private function sTonClass() // The constructor of the class is decleared as private 
		{ }							 // so no it is not possible to create an instance of the 
									 // sTonClass outside the class.
			
		
		public static function inisiate() 							//Statice function that creats the instance of the class.
		{
			 if (sTonClass::$TheInstance==NULL) 					//Create a new object of sTonClass when there is
			 {														// no previous instace present.
				sTonClass::$TheInstance = new sTonClass();
				}
				$instanceReferance =& sTonClass::$TheInstance;		// If there is already an instance exists then return  
			  return $instanceReferance;							// the referance of the old  Instance.
		}
		
		public function get($key)			
		{
		  	return $this->obj[$key];
		}
		
		public function put($key,$object)
		{
			if ($this->obj[$key]==NULL)		
		  		$this->obj[$key]=$object;
		}
		
		public function invalidate($key)
		{
			unset($this->obj[$key]);
			return (isset($this->obj[$key]));
				
		}
	} // End of Class sTonClass

	
?>