my crontab looks like this :
1 0 * wget -nv http🙁...)/myscript.php
I am not sure that you can call directly the php script within crontab (at least it depends how php is installed in your server).
you can use "lynx" instead of "wget" but lynx may bother you with "wrong term type" error messages. if your Linux is FreeBSD, you can also use "fetch".