<?
error_reporting(E_ALL ^ E_NOTICE);
$time=date('G-i-s-u'); //nj
echo 'You may test yourself by typing in the below field and clicking submit. Timer immediately after the page loads.<br>';
if (isset($_POST['typetext'])) {
	$time_end=explode('-',$time);
	$time_start=explode('-',$_POST['timestart']);
	$time_start[0]=bcmul($time_start[0],'3600000000');
	$time_start[1]=bcmul($time_start[1],'60000000');
	$time_start[2]=$time_start[2]*1000000;
	$start_time=bcadd(bcadd($time_start[0],$time_start[1]),bcadd($time_start[2],$time_start[3]));
	$time_end[0]=bcmul($time_end[0],'3600000000');
	$time_end[1]=bcmul($time_end[1],'60000000');
	$time_end[2]=$time_end[2]*1000000;
	$end_time=bcadd(bcadd($time_end[0],$time_end[1]),bcadd($time_end[2],$time_end[3]));
	$totaltime=bcsub($end_time,$start_time);
 
	//above calculates the total time with great accuracy
	$totaltime=bcdiv($totaltime,1000000);
	if ($_SERVER['SERVER_NAME']!=='localhost') { $totaltime-=1000000; }
	if (strlen($_POST['typetext'])) {
		$chars=strlen($_POST['typetext']);
		$chars/=3;
		$subtime=60/$totaltime;
		$result=$totaltime/$chars;
		$result=$subtime/$result;
		}
	echo 'Your typing speed is: '.round($result,2).' words per minute.<br>';
	} else { unset($time); }
?>
<form method='post' style='margin:0px; padding:0px;'>
<input type='hidden' value='<? echo date('G-i-s-u'); ?>' name='timestart'>
<textarea name='typetext' style='width:50%; height:75px;'></textarea>
<input type='submit' value='submit'>
</form><br>
Note that the more you type the more accurate the test will be.