[Misiur]

For sql you have at least 2 options:
1. single field

Quote:

UPDATE `yourtable` SET paydays = paydays + 1

2. New table, with additional fields like date

Quote:

INSERT INTO `newtable` SET id = null, paydate = NOW()

(something like this)

For filesystem simply create single file called paydays or something, and add a new line every payday.