Question

I’m working with currency input. Only two digits after decimal mark should be used. I tried casting input to float and multiplying by 100, which works fine until someone enters more than two digits after decimal mark:

// Returns 6999.8 instead of 6999
$cents = floatval('69.998') * 100;

Then I tried casting result to int, so sequential digits after decimal point are ignored. It solves above problem (‘69.998’ becomes 6999), but creates a new one with float to integer conversion:

// Returns 6998 instead of 6999
$cents = intval(floatval('69.99') * 100);

I also considered floor(), but it triggers the same float issue as intval().

This is what I’m thinking about using:

$cents = intval((string)(floatval('69.99') * 100));

It works in both cases, but feels like a hack and it’s late and my head hurts so maybe I’m missing something obvious here. Is there a better way to do this?

Answer 1

Is

$cents = intval(round(floatval('69.99') * 100));

what you need?

You can also specify the precision. For example, in your case you mentioned you would like to round the original to two decimal places:

$twodecimal = round(floatval('69.998'),2);//returns a float representation of 70

Be sure to have a look at the big red notice in these docs