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我有这个数据库，其中包含表一个问题和其他答案，我需要使用PHP来更新问题和答案，但是当我做查询选择问题和答案时，我得到四个问题和四个答案或一个问题和一个答案，这里是我的表结构在更新中避免重复的数据在php mysql中？
------------------------------------------------------- ---------------------
| question | | answers |
------------------------------------------------------- ---------------------
PHP server scripts are surrounded by delimiters, which?| | <&>...</&>
| | <?php>...</?>
| | <script>..</script>
| | <?php...?>
这里是我的完整代码
<?php include ("connection.php"); ?>
<?php
$msg = "";
if (isset($_POST['update'])) {
if (is_numeric($_POST['question_id'])) {
$question_id = mysqli_real_escape_string($link, htmlspecialchars($_POST['question_id']));
$question_text = mysqli_real_escape_string($link, htmlspecialchars($_POST['question_text']));
$test_id = mysqli_real_escape_string($link, htmlspecialchars($_POST['test_id']));
if ($question_text == "" || $test_id == "") {
$msg = "يرجى تعبيئة كافة الحقول";
} else {
$sql = mysqli_query($link, " UPDATE `question` SET `question_text`='".$question_text."',`test_id`= '".$test_id."'
WHERE `question_id` = '".$question_id."' ")or die(mysqli_error($link));
/* UPDATE `question` SET `question_text`='".."',`test_id`= '".."' WHERE `question_id` = */
}
} else {
echo "Error !";
}
}else {
if (isset($_GET['question_id']) && is_numeric($_GET['question_id']) && $_GET['question_id'] > 0) {
$question_id = $_GET['question_id'];
$query = mysqli_query($link, "SELECT * FROM `question` WHERE `question_id` = '".$question_id."' ")
or die(mysqli_error($link));
while ($row = mysqli_fetch_assoc($query)) {
$question_id = $row ['question_id'];
$question_text = $row ['question_text'];
$test_id = $row['test_id'];
$query2 = mysqli_query($link,"SELECT * FROM `answers` WHERE answers.question_id = '".$question_id."' ") or die(mysqli_error($link));
while($row2 = mysqli_fetch_assoc($query2)){
$answer_text = $row2 ['answer_text'];
$correct = $row2 ['correct'];
}
/*
SELECT question.question_id,question.question_text,question.test_id,test.test_name
FROM question,test
WHERE question.test_id = test.test_id
AND question.question_id= '".$question_id."'
*/
/* SELECT `answer_text`, `correct` FROM `answers` WHERE answers.question_id = 6 AND answers.correct = 1 */
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="RTL" lang="Ar">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<link href="css/style.css" media="screen" rel="stylesheet" type="text/css" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="refresh" content="30">
</head>
<body>
<form method= "POST" action = "" >
<p>
<label><p>الحقل المخصص للسؤال</p></label>
<textarea name = "question_text"><?php echo $question_text ; ?> </textarea>
</p>
<p>
<label>رقم الاختبار</label>
<td><input type="text" name="test_id" value="<?php echo $test_id ; ?>" /></td>
</p>
<p>
<label>الخيار الاول</label>
<input type="text" name="" value="<?php echo $answer_text ; ?>" />
</p>
<p>
<label>الخيار الثانى</label>
<td><input type="text" name="" value="<?php echo $answer_text ; ?>" /></td>
</p>
<p>
<label>الخيار الثالث</label>
<td><input type="text" name="" value="<?php echo $answer_text ; ?>" /></td>
</p>
<p>
<label>الخيار الرابع</label>
<td><input type="text" name="" value="<?php echo $answer_text ; ?>" /></td>
</p>
<p>
<input type="submit" name="update" value="تحديث البيانات" class="button save" />
</p>
<p>
<input type="hidden" name = "question_id" value="<?php echo $_GET['question_id']; ?>" />
</p>
</form>
</body>
</html>
<?php
}
}
}
?>
请提供SQL以及它给出的意外结果。这不是很好的结构化问题。 –
@JakubKopřiva这里是我的代码 – mohammed
您能否首先确认数据库中没有重复行？您可以通过运行以下（其中x是具有多个答案的问题ID）重现该问题：select question（*）from question_id =“x”; – Cathal