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

A simple function to follow would be "If greater than 0 floor, else ceil", using a multiplier to raise it above the decimal point temporarily whilst doing it:

function trim_num($num_in, $dec_places = 2) {
    $multiplier = pow(10, $dec_places); // 10, 100, 1000, etc
    if ($num_in > 0) {
        $num_out = floor($num_in * $multiplier) / $multiplier;
    } else {
        $num_out = ceil($num_in * $multiplier) / $multiplier;
    }
    return $num_out;
}