Question

I would like to know how to get the date and time difference in minutes based on
which i need to do expiry of 1 hour for login , after 60 minutes has expired users can resume login .

$currentdate = 1336468008 
$storeddate = 1336464866

Answer 1

$timeDiff = $currentdate - $storeddate

Gives you difference in seconds

Divide by 60 for minutes and by 60 again for hours.

You could just divide the result by 3600 and if the answer > 1 set expired.

if(($currentdate - $storeddate)/3600 > 1) doExpiryStuff();