每5分钟执行一次PHP cron，但15分钟后将函数置于睡眠状态以运行

Question

I have a PHP script that run on cron every 5 minutes.

*/5 * * * * /var/www/html/processMail.php

Inside the script there is a function that I want to execute every 15 minutes, so that function will be in sleep mode but the rest of the script will be process every 5 minutes.

does this crazy idea will work and how?

Answer 1

does this crazy idea will work and how?

No it won't. The each 15 minute function would - even if you manage to wait 15 minutes - be executed each 5 minutes - so effectively the 15 minutes function is executed each 5 minutes. Instead create a second script that is executed every 15 minutes or add a parameter:

*/5 * * * * /var/www/html/processMail.php --mins=5
*/15 * * * * /var/www/html/processMail.php --mins=15

Then use the functionality to parse commandline-parameters in PHP (and getopt ) to process accordingly. See as well the section about commandline usage in the PHP manual .

Answer 2

You could save an iterator in a file or a database and increment it after every run, this way you can only run it once in 3 times the script runs.

However, a much better solution would simply be to write another script and run it every 15 minutes.