How can i Run php script using cronjob / crontab???

Any ideA?

If your PHP scripts do have executable permissions like 755 or -rwxr-xr-x and they have one of the PHP filename extensions above, then you do not need to specify the php interpreter in the command portion of your cron line, like this:

5 17 * * 2 /myscript.php

The above cron would run myscript.php in your home directory every Tuesday at 5:05PM.

some more example...

28 14 * * * /usr/local/bin/php -q /myscript.phtml
6 3 20 4 * /usr/local/bin/php -q /htdocs/www/x.php