如何使用简洁的片段确定分层税率？ [关闭]

Question

I am trying to create a tiered tax calculator.

The user enters an amount, say 500,000

From that amount, I then have the following tiers that tax is charged as follows:

        0 -   125,000 = 0%
  125,001 -   250,000 = 2%
  250,001 -   925,000 = 5%
  925,001 - 1,500,000 = 10%
1,500,001 -   or more = 12%

So no tax on the first 125,000, then 2% on the next 124,999 and so on.

I can come up with long winded calculations with far too many lines of code. I am sure there is a relatively simple way to do this, so I am bowing to the greater knowledge of folks here to find a more concise method.

Answer 1

Hm, nice challenge though. I'm sorry, I couldn't really come up with a smart way, but if you are in dire need I created this little function;

function calculator($value) {

    if(!is_int($value) && !is_double($value))
        return;

    if($value > 1500000)
        $value = $value - ($value*0.12);

    elseif($value > 925000)
        $value = $value - ($value*0.10);

    elseif($value > 250000)
        $value = $value - ($value*0.05);

    elseif($value > 125000)
        $value = $value - ($value*0.02);

    return $value;

}

You just feed it with a value (int or double) and it will return the calculated value. Be aware you can't use , (comma) though.

Edit: Changed to logic a little.