php计算2023年每个月税额的方法

案例：

个人所得税税率表：

以下为当前最新个税计算方法，

function gs()
{$month = 12;//月份$salary = 30000;//月薪$other = 6500;//社保+公积金+专项附加扣除$minus = 0;//速算扣除数$tax = 0;//总税额$nowTax = 0;//当月税额$allSalary = 0;//总工资for ($i = 1; $i <= $month; $i++) {$allSalary = ($salary * $i - 5000 * $i - $other * $i);if ($allSalary <= 36000) {$minus = 0;$rate = 0.03;} elseif ($allSalary < 144000) {$minus = 2520;$rate = 0.1;} elseif ($allSalary < 300000) {$minus = 16920;$rate = 0.2;} elseif ($allSalary < 420000) {$minus = 31920;$rate = 0.25;} elseif ($allSalary < 660000) {$minus = 52920;$rate = 0.3;} elseif ($allSalary < 960000) {$minus = 85920;$rate = 0.35;} else {$minus = 181920;$rate = 0.45;}$nowTax = ($salary * $i - 5000 * $i - $other * $i) * $rate - $minus - $tax;echo "当月应纳税所得额：$allSalary ，".$i. "月税额：($salary * $i - 5000 * $i - $other * $i) * $rate - $minus - $tax = ".$nowTax.PHP_EOL;$tax += $nowTax;}echo "总税额：$tax".PHP_EOL;
}

结果：