Member Avatar for colweb

Have written a simple PHP program to get data from a database to an accounting program. Therefore I need to do some calculations. And one of them goes completely wrong.

<?php
$prijs = 480.00;
$nvh = 432.00;
$prov = 40.34;
$btw = 7.66;

$over = $prijs - ($nvh + $prov + $btw);
$tmp = ($nvh + $prov + $btw);

echo $prijs."\n";
echo $tmp."\n";

echo $prijs - $tmp."\n";
echo $over."\n";

?>

The result should be $over == 0 and $prijs - $tmp should also be 0.
But I get the following output:
480
480
-5.6843418860808E-14
-5.6843418860808E-14

Anybody? What is going on here?

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Member Avatar for colweb

Read the warning:
http://php.net/manual/en/language.types.float.php

Thanks for pointing me in the right direction. bcsub does do the trick.
Never thought you would need it when you only add or subtract some numbers.

Edited by colweb because: n/a
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