Question

I want to get a reminding day left using timestamp and current date. Was wondering if I can do a simple subtraction using those.

How do I calculate the currentdate -timestamp?

Answer 1

PHP’s timestamps are identical to a Unix timestamp – seconds since Jan 1 1970. So yeah, a simple subtraction will give you a time difference in seconds, which you can convert to days by diving by 86,400 (seconds in a day):

$days = (time() - $oldtimestamp) / 86400;