<?php declare (strict_types=1); namespace app\service\util; use app\service\ConfigService; use function GuzzleHttp\Psr7\str; /** * @author canny * @date 2023/10/20 15:28 **/ class PriceCalculatorService { public static function add($a, $b, $scale = 2): string { return bcadd((string)$a, (string)$b, $scale); // 保留两位小数 } public static function subtract($a, $b, $scale = 2): string { return bcsub((string)$a, (string)$b, $scale); } public static function multiply($a, $b, $scale = 2): string { return bcmul((string)$a, (string)$b, $scale); } public static function divide($a, $b, $scale = 2): ?string { if (bccomp((string)$b, '0', 2) === 0) { throw new \Exception('不允许除以零'); } return bcdiv((string)$a, (string)$b, $scale); } }