pseudo-cron v1.3

Usually regular tasks like backup up the site's database are run using cron jobs. With cron jobs, you can exactly plan when a certain command is to be executed. But most homepage owners can't create cron jobs on their web server – providers demand some extra money for that.
The only thing that's certain to happen quite regularly on a web page are page requests. This is where pseudo-cron comes into play: With every page request it checks if any cron jobs should have been run since the previous request. If there are, they are run and logged.

Pseudo-cron uses a syntax very much like the Unix cron's one. For an overview of the syntax used, see a page of the UNIXGEEKS. The syntax pseudo-cron uses is different from the one described on that page in the following points:

• you may not use abbreviations (Mon, Tue, ...) for day of week new in v1.1!
• there is no user column
• the executed command has to be an include()able file (which may contain further PHP code)

#comments start with '#'
#mi  h    d    m    dow      job                       comment
0    5    *    *    Sun      cronjobs/dump.inc.php     # make db dump every sunday at 5 am
40   5    2    *    *        cronjobs/sendlog.inc.php  # send last month's web server logs
*/15 8-19 *    *    Mon-Fri  cronjobs/refr_ext.inc.php # refresh external news sources