I've looked for a while to find an answer on this and haven't come up with anything.

I have a number, say 6.7

I want it to round in increments of .5, and to the nearest. I'm trying to make a php version of the formula I used in excel, which was the floor() function.. only in excel I used: =FLOOR(SUM(I4:L4)/4,0.5)

So 6.7 should be 6.5, 6.75 should still be 6.5, 6.76 should be 7. And so on.

Any ideas on how I can do this?

# Rounding to the nearest .5

Started by phpvolution, Jun 14 2006 08:23 AM

4 replies to this topic

### #1

Posted 14 June 2006 - 08:23 AM

### #2

Posted 14 June 2006 - 10:10 AM

sure take

$string * 2

and then round to nearest and then divide it by 2

ex:

6.4 * 2 = 12.8 = 13 = 6.5

6.23 = 12.46 = 12 = 6

$string * 2

and then round to nearest and then divide it by 2

ex:

6.4 * 2 = 12.8 = 13 = 6.5

6.23 = 12.46 = 12 = 6

z..z..z..z..z..z..z..z..

### #3

Posted 14 June 2006 - 10:24 AM

Thanks, my brain doesn't seem to be functioning!

$x = floor($x*2)/2;voila.

### #4

Posted 14 June 2006 - 10:32 AM

you will need to use round if you want 7 for 6.8 and not 6.5

z..z..z..z..z..z..z..z..

### #5

Posted 14 June 2006 - 10:34 PM

Thanks for pointing that out,

6.75 was being rounded up instead of down also, so I went with an If statement to handle that.

Seems to work. thanks.

6.75 was being rounded up instead of down also, so I went with an If statement to handle that.

if(substr($x,1) > .75) { $y = round($x*2)/2; } else { $y = floor($x*2)/2; }

Seems to work. thanks.

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