<?php
/**
* @see https://community.developer.authorize.net/t5/The-Authorize-Net-Developer-Blog/Precision-Math-with-PHP/ba-p/8368
*/
var_dump((0.2 + 1.4) * 10);
var_dump(floor((0.2 + 1.4) * 10)); // Should be 16. But it's 15!
// Using BC Math
var_dump(bcadd('0.2', '1.4', 2) * 10); // It's 16 like we would expect it to be.
float(15.999999999999998)
float(15)
Fatal error: Uncaught Error: Call to undefined function bcadd() in /in/lOHnK:12
Stack trace:
#0 {main}
thrown in /in/lOHnK on line 12
Process exited with code 255.
Output for 7.0.5, 7.3.32 - 7.3.33, 7.4.33
float(16)
float(15)
Fatal error: Uncaught Error: Call to undefined function bcadd() in /in/lOHnK:12
Stack trace:
#0 {main}
thrown in /in/lOHnK on line 12
Process exited with code 255.