Caclculating Date Differnece

[iweyou]

hi All:
I'm facing problem calcualting differnec between Date and Sessiontime.I have 2 variables.
1.LogoutDate //Format is:"2003-04-19 11:53:11 AM"
2.Sessiontime //i.e Time in Seconds
Now I have to Calculate the user login date and time having both these values..I'm new to PHP I have tried the following code but it gives strang resultes.
/////----Code starts here---- //////
<?php
//session time is 155 seconds...
$sesstime = mktime(0,0,155);
$logoutdate = strtotime("2003-04-19 11:53:11 AM");
$Firstdate =$sesstime;
$Lastdate = $logoutdate;
echo "<br>";
//difference Calculation
$diff = $Lastdate-$Firstdate;
echo "<br>";
echo "Difference is:" , date("y-m-d h:i:s A",$diff);
?>
/////----Code Ends here---- //////

AND RESULT IS:

"Difference is:69-12-28 06:50:36 AM"

I was suppose to Recieve "("2003-04-19 11:50:36 AM")"Only Minutes and Seconds are subtracted but the whole date format is strang.

imediate help will highly be appriciated.
Thanks

[laserlight]

Actually, you are trying to calculate the time elapsed since the last logout, right?

Maybe you could try:

<?php
$logout_date = "2003-04-19 11:53:11 AM";

$last_date = strtotime($logout_date);
$current_date = time();

echo '<br>Difference is: ';
echo date("Y-m-d h:i:s A", $current_date - $last_date);
?>

[iweyou]

Thanks For Reply

Actually,I'm trying to get LOGINTIME provided with LOGOUTTIME and the Time elapsed between LogoutTime and LoginTime is SessionTime given in Seconds........