Plesk cronjob, run (get) PHP page

[b:85718e1c8a]Plesk cron code:[/b:85718e1c8a]
[code:1:85718e1c8a]wget -O /dev/null -q http://www.site.com/file.php[/code:1:85718e1c8a]

[b:85718e1c8a]Note:[/b:85718e1c8a]
Wget could be on various locations, depending on your server distro.
Normal paths are:

wget
/usr/bin/wget
/etc/wget
/usr/local/bin/wget

If these do not work, contact your webhost or your sys-admin.