If a PHP script is run as a cron script, the includes often fail if relative paths are used. For example, if you have
the file foo.php will be found when run on the command line, but not when run from a cron script.
A typical workaround for this is to first chdir to the working directory, or use absolute paths. I would like to know, however, what is different between cron and shell that causes this behavior. Why does it fail when using relative paths in a cron script?