使用php和mysql從多個數組形式輸入中插入數據

Question

我有三個領域

<textarea rows="2" name="answer[]" ></textarea>
<select name="fraction[]">...
<textarea rows="2" name="feedback[]"></textarea>

用戶應至少一次填充此字段至少四次，然后使用php遍歷此字段以將其插入數據庫

$answer = isset($_POST['answer']) ? $_POST['answer'] : "" ;
$fraction = isset($_POST['fraction']) ? $_POST['fraction'] : "" ;
$feedback = isset($_POST['feedback']) ? $_POST['feedback'] : "" ;

foreach($answer as $key=>$value){
    $answer = $value;
    $fraction = $fraction[$key];
    $feedback = $feedback[$key];
    $query = "insert into `question_answer` ( answer, fraction, feedback) values ('$answer', '$fraction','$feedback')";
    $questions->insertData($query,$con);
}

此插入記錄數，第一條記錄包含我想要的所有值，但其他記錄僅包含與我循環通過的數組相關的字段的值，其他字段為空。

Answer 1

您在第一個循環中覆蓋了變量……

$answer = isset($_POST['answer']) ? $_POST['answer'] : "" ;
$fraction = isset($_POST['fraction']) ? $_POST['fraction'] : "" ;
$feedback = isset($_POST['feedback']) ? $_POST['feedback'] : "" ;

foreach($answer as $key=>$value){
    $query = "insert into `question_answer` ( answer, fraction, feedback) values ('$value', '$fraction[$key]','$feedback[$key]')";
    $questions->insertData($query,$con);
}