PHP测验数组答案的计算 [英] PHP Quiz Calculation of Array Answers

问题描述

我有一个使用html单选按钮设计的测验，并且计算由某些PHP处理。

I have a quiz designed using html radio buttons and the calculation is handled by some PHP.

请参见以下基本html布局（已删除一些元素以便于阅读）；

See below for the basic html layout (some elements removed for ease of reading);

// q1 answer is value 2
<input type="radio" name="form[1-1]" value="1">
<input type="radio" name="form[1-1]" value="2">

// q2 answer is value 1
<input type="radio" name="form[1-2]" value="1">
<input type="radio" name="form[1-2]" value="2">

// q1 answer is value 2
<input type="radio" name="form[1-3]" value="1">
<input type="radio" name="form[1-3]" value="2">

// q4 answer is value 1 AND 2 AND 4
<input type="checkbox" name="form[1-4][]" value="1">
<input type="checkbox" name="form[1-4][]" value="2">
<input type="checkbox" name="form[1-4][]" value="3">
<input type="checkbox" name="form[1-4][]" value="4">

我目前可以使用的PHP代码（感谢 PHP测验单选和复选框计算），但是它在具有多个答案的问题上分了分。

The PHP code I have currently works (thanks to PHP Quiz Radio and Checkbox Calculation), however it splits points on questions with multiple answers.

$solutions = ['1-1' => 2, '1-2' => 1, '1-3' => 2, '1-4' => [1,2,4]];

foreach ( $solutions as $question => $solution ) {
    $userAnswer = $_POST['form'][$question] ?? null;
    if ( is_array($solution) ){
        $marksPerAnswer = 1/count($solution);
        $correct = array_intersect($solution, $userAnswer);
        $total += $marksPerAnswer * count($correct);
    }
    else    {
        $total += ($userAnswer == $solution);
    }
}

我该如何为完全正确的答案分配一个点？

How can I assign one point for fully correct answers only?

推荐答案

如果您只想计算完全正确的答案，则可以将期望答案的数量与匹配的数量进行比较，因此将第一个if部分更改为...

If you want to only count fully correct answers, then you can compare the number of expected answers against the number that match, so change the first if part to...

if ( is_array($solution) ){
    $correct = array_intersect($solution, $userAnswer);
    $total += (count($solution) == count($correct));
}

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