Delete digits after two decimal points, without rounding the value

Question

i have value in php variable like that

$var=\'2.500000550\';
echo $var

what i want is to delete all decimal points after 2 digits.

Answer 1

someone posted here about

floor(2.500000550 * 100) / 100;

function cutAfterDot($number, $afterDot = 2){
$a = $number * pow(10, $afterDot);
$b = floor($a);
$c = pow(10, $afterDot);
echo "a $a, b $b, c $c
";
return $b/$c ;
}
echo cutAfterDot(2.05,2);

a 205, b 204, c 100
2.04

so in raw form don't use it... But if you add a little epsilon...

function cutAfterDot($number, $afterDot = 2){
        return floor($number * pow(10, $afterDot) + 0.00001) / pow(10, $afterDot);
    }

it works!