Compare floats in php

Question

I want to compare two floats in PHP, like in this sample code:

$a = 0.17;
$b = 1 - 0.83; //0.17
if($a == $b ){
 echo \'a and b are same\';
}
else {
 echo \'a         


        

Answer 1

It would be better to use native PHP comparison:

bccomp($a, $b, 3)
// Third parameter - the optional scale parameter
// is used to set the number of digits after the decimal place
// which will be used in the comparison. 

Returns 0 if the two operands are equal, 1 if the left_operand is larger than the right_operand, -1 otherwise.