计算间隔之间的进度百分比[关闭]

Question

I'm creating a game, where user can do some progress to move to new levels. Here is the code:

<?php
    $progress=150; // example
    $percentage=0;
    $level=0;

    if ($progress<300) { $level = 1; $percentage=; }
    if ($progress<600) { $level = 2 $percentage=; }
    if ($progress<900) { $level = 3 $percentage=; }

    echo $percentage;
?>

So if the progress is 150 pts for example, the level of this user is 1, and percentage he did to move to new level 2, is 50% (done).

For example if progress is 750 pts, the progress should show 50% (is done) to move to new level 3.

I choosed here simple values, 150 and 750, but I don't know how to calculate if progress is 610, 625 etc...

Let me know if you have any questions.

Thanks.

Answer 1

You should store the progresses as an array, and loop over them:

$progress = 750;
$levels = array(0, 300, 600, 900);

foreach ($levels as $key => $threshold) {
    if ($progress >= $threshold) {
        $level = $key;

        if (isset($levels[$key + 1])) {
            $percentage = 100 * ($progress - $threshold) /
                          ($levels[$key + 1] - $threshold);
        } else {
            // user has passed the final level
            $percentage = null;
        }
    }
}