<?php
/**
* @see https://community.developer.authorize.net/t5/The-Authorize-Net-Developer-Blog/Precision-Math-with-PHP/ba-p/8368
*/
var_dump(floor((0.2 + 1.4) * 10)); // Should be 16. But it's 15!
var_dump(floor(16));
// 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)
float(16)
float(16)
Output for 7.0.5, 7.3.32 - 7.3.33, 7.4.33, 8.0.13
float(15)
float(16)
Fatal error: Uncaught Error: Call to undefined function bcadd() in /in/c3sjK:11
Stack trace:
#0 {main}
thrown in /in/c3sjK on line 11
Process exited with code 255.
Output for 5.5.29 - 5.5.30, 5.5.34, 5.6.13 - 5.6.15, 5.6.20
float(15)
float(16)
Fatal error: Call to undefined function bcadd() in /in/c3sjK on line 11
Process exited with code 255.