Question

Here is my function,

It is meant to get the user level an the amount of xp needed until the next level, it works but only through levels 1 to 2, then if the required xp for level 3 is entered it fails.

The XP doubles per level, so from level 1 to 2 is 10, 2 to 3 is 20, 3 to 4 is 40 etc;

$user[‘xp’] is an int to explain better, here are some examples of what the function returns with different values.

1. $user[‘xp’] == 1, level 1, xpGot 1, xpNeeded 9, 10%
2. $user[‘xp’] == 5, level 1, xpGot 5, xpNeeded 5, 50%
3. $user[‘xp’] == 9, level 1, xpGot 9, xpNeeded 1, 90%
4. $user[‘xp’] == 10, level 2, xpGot 0, xpNeeded 20, 0%
5. $user[‘xp’] == 15, level 2, xpGot 5, xpNeeded 15, 25%
6. $user[‘xp’] == 29, level 2, xpGot 19, xpNeeded 1, 95%

7. $user[‘xp’] == 30, level 2, xpGot 0, xpNeeded 0, 0%
It fails there on after.

function calculateLevel($xpGot) {
    $level = 1;
    $xpNeeded = 10;

    while ($xpGot >= $xpNeeded) {
        $level++;
        $xpGot %= $xpNeeded;
        $xpNeeded *= 2;
    }

    if ($xpGot < $xpNeeded) {
        $xp = $xpGot / $xpNeeded * 100;
        echo '<p>Level: ' . $level . '</p>';
        echo '<div class="displayBarWrap" title="' . $xpGot . '/' . $xpNeeded . ' XP (' . $xp . '%)">
              <p>XP:</p>
            <div class="displayBar"><div style="width: ' . $xp . '%;"></div></div></div>';
    }
}

calculateLevel($user['xp']);

Answer 1

I think you want following: replace %= with -=:

$xpGot -= $xpNeeded;