<? 

class timer

{ var $StartTime = 0;

var $StopTime = 0;

var $TimeSpent = 0;



function start(){

$this->StartTime = microtime();}

 function stop(){

 $this->StopTime　= microtime();}

 function spent(){

   if ($this->TimeSpent) {

   return $this->TimeSpent;

     } else {

$S
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