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

For PHP 7.2, you can work with PHP_FLOAT_EPSILON ( http://php.net/manual/en/reserved.constants.php ):

if(abs($a-$b) < PHP_FLOAT_EPSILON){
   echo 'a and b are same';
}