cron jobs

I created a php script.

I'd like to have it run as a cron job every day at 10:30am. So i added

30 10 * * * /script.php to the cron file

Is it possible to run the script on the command line to test it out ?

You can execute the command crontab -e. The crontab file will be opened. There you can add that line (10 30 * * *).
There are some other options. -e to edit that file.