cronjob help needed

i have a php script and want to run it in every 15 sec. using cronjob
can anyone help me

 

It's impossible, smallest time unit cronjob operates is a minute.

 

thanx for your reply. Any other way to run script in every 15 sec.

 

as he said its impossible!
smallest unit is 1 minute

 

Simple, simple! If you are running on Linux, you can create the following script:

#!/bin/sh
for $count in 1 2 3 4
do [code to run PHP script]
sleep 15
done


Then, just run that script every minute via cron. Of course, there is a MUCH better way to do this, and the above code assumes that the script will compete in less than 15 secs. But, it does what you asked for!

PM me if you need more help!

 

15 sec is a really small amount of time for a loop. What is it you're doing ?