我有两个不同的数据库表问题和选项，其中我要在一个表中插入问题，而在另一个表中有多个选择，其中问题表id是选项表中的外键。
问题：
Questions_number Text
1 What is HTML?
2 What is PHP?
选择：
id question_number is_correct text
1 1 1 markup
2 1 0 Hyext
3 1 0 Hyper text markup language
4 2 0 hsdfd
5 2 0 frfwer
6 2 1 Hypertext Preprocessor
如果我要编辑问题编号1，那么我还需要获取问题，选择和更正选项的所有详细信息。但是当我也要编辑选择记录时，我会得到相同的数据我要提问题了。
HTML：
<?php session_start();
include 'includes/db.php';
$id = (int)$_GET['id'];
$sql = "SELECT * FROM questions q WHERE q.question_number = $id ";
$oppointArr =array();
$result = mysqli_query($mysqli,$sql);
if (mysqli_num_rows($result) > 0) {
while($row = mysqli_fetch_array($result))
{
$oppointArr = $row;
echo "Text: " . $row["text"]. "<br>";
}
} else {
echo "0 results";
}
?>
<form class="form-horizontal" action="updatequestions.php" method="post" role="form">
<?php if(isset($msg)) {?>
<div class="<?php echo $msgclass; ?>" id="mydiv" style="padding:5px;"><?php echo $msg; ?></div>
<?php } ?>
<input type='hidden' value='<?=$id;?>' name='question_number'>
<h2>Edit A Question</h1>
<div class="form-group">
<label for="questionno" class="col-sm-2 control-label">Question Number</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="<?php echo $oppointArr['question_number'];?>"
name="question_number" id="question_number" readonly>
</div>
</div>
<div class="form-group">
<label for="question" class="col-sm-2 control-label">Question</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="<?php echo $oppointArr['text'];?>" name="question_text" id="question_text">
</div>
</div>
<input type='hidden' value='<?=$id;?>' name='id'>
<h2>Edit A Choice</h1>
<div class="form-group">
<label for="choice #1" class="col-sm-2 control-label">Choice #1</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="<?php echo $oppointArr['choice1'];?>" name="choice1" id="choice1">
</div>
</div>
<div class="form-group">
<label for="choice #2" class="col-sm-2 control-label">Choice #2</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="<?php echo $oppointArr['choice2'];?>" name="choice2" id="choice2">
</div>
</div>
<div class="form-group">
<label for="choice #3" class="col-sm-2 control-label">Choice #3</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="<?php echo $oppointArr['choice3'];?>" name="choice3" id="choice3">
</div>
</div>
<div class="form-group">
<label for="Correct Choice Number:" class="col-sm-2 control-label">Correct Choice Number:</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="<?php echo $oppointArr['is_correct'];?>" name="is_correct" id="is_correct">
</div>
</div>
<div class="col-sm-offset-2">
<button type="submit" class="btn btn-default" name="submit_user" id="subject">Submit</button>
<button type="cancel" class="btn btn-raised"><a href="http://localhost/quizzeradmin/admin/searchquestions.php">Cancel</a></button>
</div>
</form>
更新问题：
<?php
include 'includes/db.php';
if(isset($_POST['submit_user']))
{
$questiontext = $_POST['question_text'];
$id=$_POST['question_number'];
$correct_choice = $_POST['correct_choice'];
$choices = array();
$choices[1] = $_POST['choice1'];
$choices[2] = $_POST['choice2'];
$choices[3] = $_POST['choice3'];
$choices[4] = $_POST['choice4'];
$choices[5] = $_POST['choice5'];
$query = "UPDATE questions SET text='$questiontext' WHERE question_number = $id";
$insert_row = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($insert_row) {
foreach($choices as $choice => $value){
if($value != ''){
if($correct_choice == $choice){
$is_correct = 1;
} else {
$is_correct = 0;
}
$query = "UPDATE choices SET is_correct='$is_correct', text='$value' WHERE question_number=$id";
$insert_row = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($insert_row){
continue;
} else {
die('Error : ('.$mysqli->errno . ') '. $mysqli->error);
}
}
}
$msg = 'Question has been added';
}
}
?>
如果我尝试更新记录，则所有字段都将使用相同的数据进行更新。
答案 0 :(得分：0)
警告：请勿通过将数据与SQL连接来创建SQL语句。使用准备好的语句。
对于您的问题，您可以使用问题的外键来更新选择。该键不是选择的主键，也不是唯一的。尝试对SQL使用唯一的主键。
代替此：
$query = "UPDATE choices SET is_correct='$is_correct', text='$value' WHERE question_number=$id";
尝试一下：
$query = "UPDATE choices SET is_correct='$is_correct', text='$value' WHERE id=$choice ";
但是，您当然应该真正地尝试使用准备好的语句来重新做一遍！
答案 1 :(得分：0)
<form class="form-horizontal" action="updatequestions.php" method="post" role="form">
<?php if(isset($msg)) {?>
<div class="<?php echo $msgclass; ?>" id="mydiv" style="padding:5px;"><?php echo $msg; ?></div>
<?php } ?>
<input type='hidden' value='<?=$id;?>' name='question_number'>
<h2>Edit A Question</h1>
<div class="form-group">
<label for="questionno" class="col-sm-2 control-label">Question Number</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="<?php echo $oppointArr['question_number'];?>"
name="question_number" id="question_number" readonly>
</div>
</div>
<div class="form-group">
<label for="question" class="col-sm-2 control-label">Question</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="<?php echo $oppointArr['text'];?>" name="question_text" id="question_text">
</div>
</div>
<input type='hidden' value='<?=$id;?>' name='id'>
<h2>Edit A Choice</h1>
<?php
$choicesql = "SELECT * FROM `choices` WHERE question_number = $id ";
$ChoicetArr =array();
$choiceresult = mysqli_query($mysqli,$choicesql);
$inc=1;
$correctAns ="";
if (mysqli_num_rows($choiceresult) > 0)
{
while($rows = mysqli_fetch_array($choiceresult))
{
$ChoicetArr[] = $rows;
?>
<div class="form-group">
<label for="choice #<?php echo $inc;?>" class="col-sm-2 control-label">Choice #<?php echo $inc;?></label>
<div class="col-sm-5">
<input type="hidden" name="choice_id<?php echo $inc;?>" value="<?php echo $rows['id'];?>">
<input type="text" class="form-control" value="<?php echo $rows['text'];?>" name="choice<?php echo $inc;?>" id="choice<?php echo $inc;?>">
</div>
</div>
<?php
//print_r($rows);
if($rows['is_correct']=="1"){
$correctAns = '<input type="hidden" name="choice_id'.$inc.'" value="'.$rows['id'].'"><div class="form-group">
<label for="Correct Choice Number:" class="col-sm-2 control-label">Correct Choice Number:</label>
<div class="col-sm-5">
<input type="text" class="form-control" value="'.$inc.'" name="is_correct" id="is_correct">
</div>
</div>';
}
$inc++;
}
}
echo $correctAns;
?>
<div class="col-sm-offset-2">
<button type="submit" class="btn btn-default" name="submit_user" id="subject">Submit</button>
<button type="cancel" class="btn btn-raised"><a href="searchquestions.php">Cancel</a></button>
</div>
</form>
updatequestions.php
<?php
include 'includes/db.php';
if(isset($_POST['submit_user']))
{
$questiontext = $_POST['question_text'];
$id=$_POST['question_number'];
$correct_choice = $_POST['is_correct'];
$choices = array();
$choices[] = array("question"=>$_POST['choice1'], "answer"=>$_POST['choice_id1']);
$choices[] = array("question"=>$_POST['choice2'], "answer"=>$_POST['choice_id2']);
$choices[] = array("question"=>$_POST['choice3'], "answer"=>$_POST['choice_id3']);
$choices[] = array("question"=>$_POST['choice4'], "answer"=>$_POST['choice_id4']);
$choices[] = array("question"=>$_POST['choice5'], "answer"=>$_POST['choice_id5']);
$query = "UPDATE questions SET text='$questiontext' WHERE question_number = $id";
$insert_row = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($insert_row)
{
$inc= 0;
foreach($choices as $choice => $value){
if(count($value)>0){
$answerInc = $choice+1;
if($correct_choice == $answerInc){
$is_correct = 1;
} else {
$is_correct = 0;
}
$text= $value['question'];
$answer = $value['answer'];
//echo "<br>".$text;
//print_r($value);
echo $answerInc;
echo "<br>";
echo $query = "UPDATE choices SET is_correct='$is_correct', text='$text' WHERE id=$answer";
$insert_row = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($insert_row){
continue;
} else {
die('Error : ('.$mysqli->errno . ') '. $mysqli->error);
}
}
$inc++;
}
$msg = 'Question has been Updated Successfully';
header("location:searchquestions.php");
exit;
}
}
?>