Could you please give me the best way for using PHP scripts without hosting MySQL ?

You don't need MySQL at all to host a PHP script. PHP is fully independent of MySQL in all ways.

Now are you asking whether you can use a different DB than MySQL? If so, absolutely, take a look at...

http://www.php.net/manual/en/

There are several functions for several different DB types.

Many thanks for such guide

the link was very useful