Round Whole Numbers in Increments?

[ShoeLace1291]

I was wondering if there was a way to round whole numbers in increments.  I need to make a progress bar based on percentages and for every ten percent of progress that is made, I want to add a bar.  So for example:

 

38% would display four bars

21% would display two bars

15% would display one bar.

 

Are there any PHP functions like this?

[mikecampbell]

I think you want the round function passing -1 as the second argument.

 

round(38, -1) = 40

round(21, -1) = 20

round(15, -1) = 20

 

Then divide by ten to get the number of bars.