subtracting and keeping decimals

[wright67uk]

How can I subtract from a variable, but keep my decimal places?

 

When I try the below example I return 0

 

<?php $a = $_attributeSelection["backp1"];  echo $a -1;  ?> // 1.53 becomes 0
 

However When I try the below example i return 0.69

 <?php $b = 1.69; echo $b-1;?> // 1.69 becomes 0.69
 

 

 

[Jessica]

Sounds like your first variable is a string. Do a var_dump on it to see. You can cast it to a float if needed.

[wright67uk]

Yes your right.

Is floatval best used to do that?

[Barand]

Floatval() will not help with that field

 

 

I'm looking to only return rows where the first two letters of $_attributeSelection["backp1"] are GB

[wright67uk]

That was used in a different file.

 

In this circumstance I'm only using numbers.

 

That was amazingly well spotted however!!!

[Barand]

What does var_dump() give then?

[wright67uk]

It says in using a string.

[Barand]

In that case you need to ...

[wright67uk]

Look at the manual, and get confused about the difference between floatval, intval and settype lol.

I could try one of these, until one works, but I dont want to cause any problems later down the line by using the wrong one

Edited March 3, 2013 by wright67uk