这个问题在这里已有答案：
＃我正在制作在线考试系统，我想在选项部分添加单选按钮，但是当我添加时，它显示错误。如何在选项部分添加单选按钮＃
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Question Show</title>
</head>
<body>
<?php
// database
$con = mysqli_connect('localhost','root','');
mysqli_select_db($con, 'Question');
// results per page
$results_per_page = 1;
// find out the number of results stored in database
$sql='SELECT * FROM tableoption';
$result = mysqli_query($con, $sql);
$number_of_results = mysqli_num_rows($result);
// determine number of total pages available
$number_of_pages = ceil($number_of_results/$results_per_page);
// determine which page number visitor is currently on
if (!isset($_GET['page'])) {
$page = 1;
} else {
$page = $_GET['page'];
}
// determine the sql LIMIT starting number for the results on the displaying page
$this_page_first_result = ($page-1)*$results_per_page;
// retrieve selected results from database and display them on page
$sql='SELECT * FROM tableoption LIMIT ' . $this_page_first_result . ',' . $results_per_page;
$result = mysqli_query($con, $sql);
while($row = mysqli_fetch_array($result)) {
echo $row['id'] . ' ' . $row['tableoption']. '<br>';
echo $row['opt1']. '<br>';
echo $row['opt2']. '<br>';
echo $row['opt3']. '<br>';
echo $row['opt4']. '<br>';
}
// display the links to the pages
for ($page=1;$page<=$number_of_pages;$page++) {
echo '<a href="index.php?page=' . $page . '">' . $page . '</a> ';
}
?>
</body>
</html>
<th>
<td><input type="radio" value="<?php echo $row['opt1']. ?>'<br>';/></td>
</th>
这个
<td><input type="radio" value="<?php echo $row['opt1']. ?>'<br>';/></td>
应该是这个
<td><input type="radio" value="<?php echo $row['opt1']; ?>" /><br /></td>
您忘记关闭输入的value属性。
<input type="radio" value="<?php echo $row['opt1']; ?>"/>