How to invoke a PHP script using shell script?

I am setting a cron job on my linux server.

So i am writing a shell script for it,which invoke after every 20 minutes.

In this shell script i need to do following:

I want to executed a php script if something changed(in last 20 min) in mydata开发者_Go百科.csv file.

So plese tell me how can i do this?

-Thanks

1. Check the last modified date on the CSV file and compare it to the current time (not on a *nix machine right now, Google it)

2. Execute the PHP script

   /usr/bin/php /path/to/php/script.php
   

Disclaimer: The path to your PHP binary may differ

Also see http://www.linuxforums.org/forum/programming-scripting/107278-how-prgrammatically-compare-file-timestamp-against-currrent-time.html

just call php from it

php myScript.php