PHP process control and mathematical operations

This article mainly introduces PHP process control and mathematical operations. Interested friends can refer to it. I hope it will be helpful to everyone.

The example in this article describes the method of calculating after-tax salary in PHP, as follows:

Before tax After tax
5000 3985
8000 6215
11000 8295
14000 246 80
41000 26480
44000 28280
47000 30080
50000 31805

<?php
function after_sleep($salary,$housefund_ratio=0.1,$person_insurance_ratio=.08,$medical_insurance_ratio=.04)
{
  $base = 3500;
  $housefund = $salary * $housefund_ratio; //.10 .8
  $person_insurance = $salary * $person_insurance_ratio;
  $medical_insurance = $salary * $medical_insurance_ratio;
  $insurance=($housefund + $person_insurance +$medical_insurance);
  if ($salary - $insurance  < $base ){
    return $salary - $insurance;
  }
  $taxable_income= ($salary - $insurance -$base );
   if ($taxable_income <=1500 ){
    $ratio = .03;
    $deduct = 0;
  }else if ($taxable_income > 1500 && $taxable_income <=4500) {
    $ratio = .1;
    $deduct = 105;
  }else if ($taxable_income > 4500 && $taxable_income <=9000) {
    $ratio = .2;
    $deduct = 555;
  } else if ($taxable_income > 9000 && $taxable_income <= 35000) {
    $ratio = .25;
    $deduct = 1005;
  } else if ($taxable_income > 35000 && $taxable_income <= 55000) {
    $ratio = .3;
    $deduct = 2755;
  }
  $tax = $taxable_income * $ratio-$deduct;
  $money = $salary -$insurance-$tax;
  return $money;
}
echo "税前\t税后\n";
for ($i=5000;$i<=50000;$i+=3000)
echo $i,"\t",after_sleep($i,.08),"\n";

Summary
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