How to stop decimals being rounded up or down using php

Question

I am calculating a number which I use in another calculation. the problem is this number could be 67.9699 I want it to say 67.96 without rounding up or down just chop the other digits of. I was hoping the floor function would do this like:

$num2 = floor(($num1/5)*100)/100;

How ever this is still rounding the number up to 67.97 is there a away to stop this. Any help welcome

Possible dup http://stackoverflow.com/questions/9667413/show-2-decimal-places-without-rounding-off — Rob, Dec 05 '13 at 10:59
What, exactly, is `$num1` in your code? This seems like a floating-point imprecision error to me. — Niet the Dark Absol, Dec 05 '13 at 11:00
$num1 is a number pulled out of a database e.g.$num1 = $row_Record1['price'] — Ria, Dec 05 '13 at 11:03

izn · Accepted Answer · 2013-12-05T11:09:52.833

3

It's working well for me, try this:

echo floor(67.9699 * 100) / 100;

Demo Online

By the way, number_format() rounds the number.

edited Dec 05 '13 at 11:09

answered Dec 05 '13 at 11:03

izn

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`100` can be gotten by using `pow(10, $amountOfDecimals)`. – h2ooooooo Dec 05 '13 at 11:11

score 0 · Answer 2 · answered Dec 05 '13 at 11:02

0

$num2 = substr($num2,0,5);
echo $num2;

If you want to use the number again as float

$num2 = floatval($num2);

answered Dec 05 '13 at 11:02

spod

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score 0 · Answer 3 · answered Dec 05 '13 at 11:03

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You can use number_format();

number_format

answered Dec 05 '13 at 11:03

peterdoesco.de

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How to stop decimals being rounded up or down using php

3 Answers3