Use cronjob in linux to regularly execute php scripts.

Use cronjob in linux to regularly execute php scripts.

Enter commands in linux

crontab -e

Then, use the vim command to edit the opened file and enter

0 * * * * /usr/bin/php -f /home/userxxx/update.php

Save and exit. Now, the system will automatically execute the update. php script at each time. The script can be used to write database execution, automatic mail, and other functions.

Note: Writing 0 *** php-f/home/userxxx/update. php does not work.

In addition, the cronjob format is:

MIN HOUR DOM MON DOW CMD

Field	Description	Allowed Value
MIN	Minute field	0 to 59
HOUR	Hour field	0 to 23
DOM	Day of Month	1-31
MON	Month field	1-12
DOW	Day Of Week	0-6 (0 indicates Sunday)
CMD	Command	Any command to be executed.

Use (-) to define the scope

For example, 0 0-6 *** command indicates that the command is executed at every day.

Use (,) to enumerate the time

For example, "0, 15, 30, 45 *** command" indicates that the command is executed at, and each hour.

Use (/) to specify the interval

For example, **/4 ** command indicates that the command is executed every four hours.

Combination

0-10/2 *** command indicates that the command is executed every two minutes in the first 10 minutes.