- var_dump: documentation ( source)
- sprintf: documentation ( source)
<?php
$a = 0.03;
$b = 1 - 0.97;
$c = (float)(string) 0.03;
$d = (float)(string) (1 - 0.97);
var_dump($a, $b, $a === $b, $c, $d, $c === $d);
var_dump(sprintf('%1.18f', $b), sprintf('%1.18f', $d));