Cron job problem


I want to add a cron to execute some php files at every minute for this i have add

52 6 1 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /home/.sites/data/cron.monthly )

to /etc/crontab

/home/.sites/data/cron.monthly consist one executable which executes all php files one by one

Is it a right way of adding cronjob