Am trying to do this by command line on my server (no control panel)
My /etc/crontab looks like this:

#for vshare processing
*/3 * * * * /usr/local/bin/php -q /usr/local/www/data-dist/cron.php > /dev/null &


I keep getting the following error:

Sep 16 10:37:00 localhost /usr/sbin/cron[726]: (*system*) RELOAD (/etc/crontab)
Sep 16 10:37:00 localhost /usr/sbin/cron[726]: login_getclass: unknown class 'php'
Sep 16 10:37:00 localhost /usr/sbin/cron[726]: (*system*) PARSE (bad username)
Sep 16 10:37:00 localhost /usr/sbin/cron[726]: (process) ORPHAN (no passwd entry)


Any ideas what may be going wrong?