start_timer.php

<?php 

  $start=$_SESSION['time_start'];  
        
        $ItemStartDate=$start."<br>"; 
        $ItemEndDate = $end."<br>"; 
        //    $Today = time(); 
        $TimeLeft = $ItemEndDate - $ItemStartDate; 
       
        //$TimeLeft = $ItemEndDate - $ItemStartDate; 
        if($TimeLeft > 0) 
        { 
        $ADayInSecs = 24 * 60 * 60; 
        $Days = $TimeLeft / $ADayInSecs; 
        $Days = intval($Days); 
        
        $TimeLeft = $TimeLeft - ($Days * $ADayInSecs); 
        $Hours = $TimeLeft / (60 * 60); 
        $Hours = intval($Hours); 
        $TimeLeft = $TimeLeft - ($Hours * 60 * 60); 
        
        $Minutes = $TimeLeft / 60; 
        $Minutes = intval($Minutes); 
        $TimeLeft = $TimeLeft - ($Minutes * 60); 
        echo "<span id='clock'>".$Minutes.':';
        
        $Seconds = $TimeLeft; 
        $Seconds = intval($Seconds); 
        
        $TimeLeft = $TimeLeft - ($Seconds / 60 * 60 ); 
        $MilliSeconds = $TimeLeft; 
        
        
        } 
?>