How to silence cron?

[Per olof Ljungmark]

Hi,

What would be the proper way to silence output from a php script running 
under cron? I have tried variations of /dev/null and 2>&1 but getting 
nowhere.

Abbriviated crontab looks like

SHELL=/bin/sh
PATH=/etc:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin
MAILTO="someimportantperson"

*/5 * * * * su -m www -c "/usr/local/bin/php 
/usr/local/www/pathtoscript.php"

Roots shell is FBSD standard csh
www's shell is /usr/sbin/nologin

With the rest of the crons I do want mail to be sent, just not this one.

Thanks,

Per