set values once

let say that i want to allow someone (the site admin maybe) to chose
certain configuration values, for instance

* number of products per page
* picture widht
* back color
....
....

Right now, i just have all those info in a php page, so it can't be
modified
$number of products_per_page = 20;
$picture_widht = 2;
$back_color = #FFFFFF;

I could keep this info in the database, but i should read it every time
a page is rendered... (open connection, query, close conn)

What would be the best way to do what i'm need? Is there any chance to
"read once, keep value for ever" ?

regards - jm

.

Quantcast