Minute
Minute of the hour, 00 to 59
Hour
Hour of the day in 24-hour format, 00 to 23
Day
Day of the month, 1 to 31
Month
Month of the year, 1 to 12
DayDay of week
3 chars - sun, mon, tue, or numeric (0=sun, 1=mon etc)
Command = The command you want to execute
The time is in twenty four hour time. So you may have guessed already that the 00 is the minutes and the 18 above is 6:00pm. The asterix character * is a wild card and means every. That is, every minute or every day, or every month. This means the script.php script would be executed every day of every month.
For example:
* * * * * would mean every minute
0 0 * * * would mean at midnight every night.
e.g.
* * * * * php /yourfolder/yourfile.php
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