【发布时间】：2017-08-21 23:58:33
【问题描述】：
我有一个选择标签的章节，我正在从其中加载查询结果。但它没有显示在 select 标签中，章节名称显示为 echo 语句。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>MCQ Questions</title>
</head>
<body>
<?php
session_start();
$dbh = new PDO('mysql:host=174.75.54;dbname=handbook', 'airman', 'airman');
$type = $_POST['type'];
$question = $_POST["question"];
$optionA = $_POST["opt1"];
$optionB = $_POST["opt2"];
$optionC = $_POST["opt3"];
$optionD = $_POST["opt4"];
$ans = $_POST["ans"];
$chapter = $_POST["chapter"];
?>
<form method="post" action="mcq.php" enctype="multipart/form-data">
<?php if(isset($_POST['question']))
{
?>
Enter the question: <input name="question" type="text" value = "<?php echo $question?>"</input> <br><br>
<?php
}
else
{
?>
<p> Enter the question :</p> <input name="question" type="text"></input> <br><br>
<?php
}
?>
Select rank :
<select name="type" id="type" onchange="this.form.submit()">
<?php if(isset($_POST['type']))
{ ?>
<option value="1" <?php echo($type==1?"selected":"");?>>SSgt</option>
<option value="2" <?php echo($type==2?"selected":"");?>>TSgt</option>
<option value="3" <?php echo($type==3?"selected":"");?>>MSgt</option>
</select>
<?php
}
else
{
?>
<option value="1">SSgt</option>
<option value="2">TSgt</option>
<option value="3">MSgt</option>
</select>
<?php
}
?>
<br><br>
<?php if(isset($_POST['opt1']))
{ ?>
<p> Enter options :</p>
Enter option A : <input name="opt1" type="text" value = "<?php echo $optionA?>"</input> <br><br>
<?php
}
else{
?>
<p> Enter options :</p>
Enter option A : <input name="opt1" type="text"> <br><br>
<?php
}
?>
<?php if(isset($_POST['opt2']))
{ ?>
Enter option B : <input name="opt2" value = "<?php echo $optionB?>"</input> <br><br>
<?php
}
else{
?>
Enter option B : <input name="opt2" type="text"> <br><br>
<?php
}
?>
<?php if(isset($_POST['opt3']))
{ ?>
Enter option C : <input name="opt3" value = "<?php echo $optionC?>"</input> <br><br>
<?php
}
else{
?>
Enter option C : <input name="opt3" type="text"> <br><br>
<?php
}
?>
<?php if(isset($_POST['opt4']))
{ ?>
Enter option D : <input name="opt4" value = "<?php echo $optionD?>"</input> <br><br>
<?php
}
else{
?>
Enter option D : <input name="opt4" type="text"> <br><br>
<?php
}
?>
Select correct answer :
<select name="ans" id="type">
<?php if(isset($_POST['ans']))
{
?>
<option value="A" <?php echo($ans==A?"selected":"");?>>A</option>
<option value="B" <?php echo($ans==B?"selected":"");?>>B</option>
<option value="C" <?php echo($ans==C?"selected":"");?>>C</option>
<option value="D" <?php echo($ans==D?"selected":"");?>>D</option
</select>
<br><br>
<?php
}
else
{
?>
<option value="A">A</option>
<option value="B">B</option>
<option value="C">C</option>
<option value="D">D</option>
</select>
<?php
}
?>
<br><br>
Select Chapter :
<select name="chapters" id="chapters">
<?php
if(isset($_POST['type']))
{
$stmt = $dbh->prepare("SELECT * FROM chapters where type = :type");
$stmt->bindParam("type", $type);
$stmt->execute();
$results = $stmt->fetchall(PDO::FETCH_ASSOC);
if(count($results > 0)){
foreach($results as $row):?>
<option value="<?php echo $row['id'];?>"><?php echo $row['title'];?></option>
<?php
endforeach;
}else{?>
<option value="0">No data found</option>
<?php
}
}
else{
$stmt = $dbh->prepare("SELECT * FROM chapters where type = 1");
$stmt->execute();
$results = $stmt->fetchall(PDO::FETCH_ASSOC);
if(count($results > 0)){
foreach($results as $row):?>
<option value="<?php echo $row['id'];?>"><?php echo $row['title'];?></option>
<?php
endforeach;
}else{?>
<option value="0">No data found</option>
<?php
}
}
?>
</select> <br><br>
<input type="Submit" value = "Submit" name="b1">
<?php
if(isset($_POST['b1']))
{
ini_set('display_errors', 1);
error_reporting(1);
ini_set('error_reporting', E_ALL);
$type = $_POST['type'];
$question = $_POST['question'];
$optionA = $_POST['opt1'];
$optionB = $_POST['opt2'];
$optionC = $_POST['opt3'];
$optionD = $_POST['opt4'];
$ans = $_POST['ans'];
$chapter = $_POST['chapters'];
$stmt = $dbh->prepare("INSERT INTO questions (question,answer_a,answer_b,answer_c,answer_d,answer,type,chapterId) VALUES (?, ?, ?, ?, ?, ?, ?,?)");
$stmt->execute(array($question, $optionA, $optionB, $optionC, $optionD, $ans,$type,$chapter));
if ($dbh->lastInsertId())
{
echo 'Question submitted.';
echo '<a href="mcq.php">Upload another question.</a>';
session_destroy();
}
else
{
echo 'Question could not submit.';
}
}
?>
</form>
</body>
</html>
如果没有设置类型，它会第一次加载选择标签中的数据，但如果设置了类型，它会显示类似于回显语句的章节。
这里有什么问题？请帮忙谢谢。
【问题讨论】：
标签： javascript php html sql select