Doubles in PHP

[JordashTalon]

I'm trying to write a page generation script but some of my calculations will come out to decimal places.

For example

$var=10/3;

would give about 3.333 I would need to round that to 4

or basically

$var=$a/$b and always round up, how would I do that?

Thanks

[Mark Baker]

$var=ceil($a/$b) 

[JordashTalon]

Thanks, got a logic question related to this,

Let's say i'm displaying 3 items per page and I generate a query string to tell me which page i'm on:

example: http://domain.com/thepage?pageOn=page

$pageOn=$_GET['pageOn'];

so if i'm on page 1 I start listing things starting from position 1 in the database table, then if I'm on Page 2 I start listing from point 4 and if i'm on page 3 I start listing from Page 7. How would I calculate where to start from.

page 1=start 1;
page 2=start 4;
page 3=start 7;

I think it's some type of Algebraic Equation.

[Mark Baker]

C'mon, this is absolutely basic mathematics:

$start = (($page -1) * $items_per_page) + 1

[JordashTalon]

You're running into the same problem I am, because after page 3 (it works fine up till page 3) on page 4 it resolves to starting at point 10 when it should start at 11, like below:

page 1=start 1;
page 2=start 4;
page 3=start 7;
page 4=start 11;
page 5=start 15;
page 6=start 18;

[JordashTalon]

Wait hold on, my problem was in the way I was displaying the pages, you did it right (I was doing it right except for the page calculations) it's working.

Thanks!

[crmalibu]

btw, they call this pagination if you want to search for more info.

[JordashTalon]

good to know, thanks