<?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!
var_dump(floor(16.0));
// Using BC Math
var_dump(bcadd('0.2', '1.4', 2) * 10); // It's 16 like we would expect it to be.
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
float(15.999999999999998)
float(15)
float(16)
float(16)
Output for 8.0.13
float(15.999999999999998)
float(15)
float(16)
Fatal error: Uncaught Error: Call to undefined function bcadd() in /in/e9Gch:14
Stack trace:
#0 {main}
thrown in /in/e9Gch on line 14
Process exited with code 255.
Output for 7.0.5, 7.3.32 - 7.3.33, 7.4.33
float(16)
float(15)
float(16)
Fatal error: Uncaught Error: Call to undefined function bcadd() in /in/e9Gch:14
Stack trace:
#0 {main}
thrown in /in/e9Gch on line 14
Process exited with code 255.