How to Write Schedule for Crontab - Php Cron Job Setup

The basic format of a crontab schedule consists of 6 fields, separated by spaces, formatted as follows:
The acceptable values for each of the 6 fields are:

Field	Range of values
minute	0-59
hour	0-23
day	1-31
month	1-12
day-of-week	0-7 (where both 0 and 7 mean Sun, 1 = Mon, 2 = Tue, etc)
command-line-to-execute	the command to run along with the parameters to that command if any