Q:

PHP auto execution

I am trying to execute a PHP script at the predefined time.  For instance, how can I write a php script that will force that script to be run on March 24th, 2013 at 11:14am(even if the browser is closed).  I heard about cron but it is not clear to me. 
Thank you for reading

A:

Indeed cron could be an answer to your question.  It is a special program that is in Linux systems and runs defined programs/commands on given time or periodically.  Look here: http://unixhelp.ed.ac.uk/CGI/man-cgi?crontab+5

