Php 阵列运算

如何移动以适应数组中问题的答案，或者如何进行sql查询以获得所需的效果？我已经厌倦了这几天了

<?php
    public function getQuestions()
    {
        $sql = 'SELECT * FROM questions';
        $result = Database::query($sql);
        while ($row = mysql_fetch_assoc($result)) {
            $questions[] = $row;
        }
        return $questions;
    }

    public function getAnswers($qid)
    {
        $sql = 'SELECT idq, answer, truth FROM answers WHERE idq = '.$qid;
        $result = Database::query($sql);
        while ($row = mysql_fetch_assoc($result)) 
        {
            $answers[] = $row;
        }   
        return $answers;
    }

    public static function array_add($a1, $a2) 
    {
        $aRes = $a1;
        foreach (array_slice(func_get_args(), 1) as $aRay) 
        {
            foreach (array_intersect_key($aRay, $aRes) as $key => $val) $aRes[$key] += $val;
            $aRes += $aRay;
        }
        return $aRes; 
    }


    public static function getQuiz()
    {
        $db = new Database();
        self::$questions = $db->getQuestions();
        foreach( self::$questions as $q )
        {
            $qid = $q['qid'];

            self::$answers[$qid] = $db->getAnswers($qid);
        }

        $s = Quiz::array_add(self::$questions, self::$answers);
        print "<pre>";
        print_r($s);
        print "</pre>";
    }
?>

我尝试过这个解决方案，但我需要分别给出答案：

Array
(
    [0] => Array
        (
            [question] => Bunty szlachty pod has?ami obrony praw nazywamy?
            [answers] => jurydyki liberum veto rokosze
        )

    [1] => Array
        (
            [question] => Kto dowodzi? wojskami kozackimi podczas powstania Chmielnickiego?
            [answers] => Bohdan Chmielnicki Gustaw II Adolf Iwan IV Gro?ny
        )

    [2] => Array
        (
            [question] => W którym roku odby?a si?, morska, bitwa pod Oliw??
            [answers] => 1608 1627 1654
        )

)

输出：

function get_quiz()
{
    $sql = 'SELECT question, GROUP_CONCAT(answer ORDER BY answer SEPARAtoR " ") as answers
            FROM questions 
            LEFT JOIN answers ON (questions.qid=answers.idq) 
            GROUP BY answers.idq;';
    $result = mysql_query($sql);
    while ($row = mysql_fetch_assoc($result)) 
    {
        $quiz[] = $row;
    }   
    return $quiz;
}

        self::$answers[$qid] = $db->getAnswers($qid);

---

问题在于这一行：

    foreach( self::$questions as $q )
    {
        $qid = $q['qid'];
        self::$answers[$qid] = $db->getAnswers($qid);
    }

ID为“1”的问题将被置于数组的第0个位置，因此所有答案将以1结束

一个潜在的解决办法是改变：

    foreach( self::$questions as $idx=>$q )
    {
        $qid = $q['qid'];
        self::$answers[$idx] = $db->getAnswers($qid);
    }

致：

---

问题在于这一行：

    foreach( self::$questions as $q )
    {
        $qid = $q['qid'];
        self::$answers[$qid] = $db->getAnswers($qid);
    }

ID为“1”的问题将被置于数组的第0个位置，因此所有答案将以1结束

一个潜在的解决办法是改变：

    foreach( self::$questions as $idx=>$q )
    {
        $qid = $q['qid'];
        self::$answers[$idx] = $db->getAnswers($qid);
    }

致：

---

你能描述一下你最终需要得到的数组结构吗？你能描述一下你最终需要得到的数组结构吗？