所得税计算的编程逻辑

Question

Is any one who can help me to create PHP or mysql Code for our Office employee salary tax table. Here is the base for our tax regulation.

 If salary is >= 0 and <= 150 it will be 0% (Nill),
 If salary is >= 151 and <= 650 it will be 10% - 15.00,
 If salary is >= 651 and <= 1400 it will be 15% - 47.50,
 If salary is >= 1401 and <= 2350 it will be 20% -117.50,
 If salary is >= 2351 and <= 3550 it will be 25% - 235.00,
 If salary is >= 3551 and <= 5000 it will be 30% - 412.5,
 If salary is >= 5001 it will be 35% - 662.50

Answer 1

You should learn basic PHP. The solution is trivial.

function getTax($salary) {
    $percent = 0;
    $subt = 0;

    if ($salary >= 0 && $salary <= 150) {
        $percent = 10;
        $subt = 15;
    } elseif ($salary >= 151 && $salary <= 650) {
        ...
    } ...

    // do calculations here, ex:
    $final = $salary * $percent / 100 - $subt;
    return $final;
}

Edit: Thank you Constantin for the function reminder