in_array（$ variable ['key']，$ another ['key']）无效

Question

I can't get in_array to work. Its running inside a function which is defined in a file I have included, and then call the function from the original file... This is getting too complex, I will add the code:

index.php

$results = $database->get_results($query);
foreach ($results as $question) {
    echo '<div class="'.addQuestionClass($question).'"></div>';
}

---

functions.php

$sectionConfig = array(
    'amount' => '20',
    'types' => array('textarea', 'text', 'select', 'number'),
);

function addQuestionClass($question) {
    if(is_array($question)) {
        $order = 'order-'.$question['order'];
        $id = ' question-'.$question['id'];

        if(in_array($question['answer'], $sectionConfig['types'])) {
            $answertype = ' type-'.$question['answer'];
            echo 'true';
        } else {
            $answertype = null;
            echo 'false';
        }

        return $answertype;
    } else {
        return;
    }
}

The problem code is in my addClass function:

in_array($question['answer'], $sectionConfig['types'])

If I run the same code, with the array from $sectionConfig pasted in, like below, it works fine, but it never recognises in the format I have it above.

this works:

in_array($question['answer'], array('textarea', 'text', 'select', 'number'))

Answer 1

You are accessing $sectionConfig inside your function. By default, this is another scope and the code in your function doesn't know that $sectionConfig exists.

You can try something like this:

$sectionConfig = array(
    'amount' => '20',
    'types' => array('textarea', 'text', 'select', 'number'),
);

$results = $database->get_results($query);
foreach ($results as $question) {
    echo '<div class="'.addQuestionClass($question,$sectionConfig).'"></div>';
}

function addQuestionClass($question,$sectionConfig) {
    if(is_array($question)) {
        $order = 'order-'.$question['order'];
        $id = ' question-'.$question['id'];

        if(in_array($question['answer'], $sectionConfig['types'])) {
            $answertype = ' type-'.$question['answer'];
            echo 'true';
        } else {
            $answertype = null;
            echo 'false';
        }

        return $answertype;
    } else {
        return;
    }
}