我创建了一个页面，其中考试数据和描述从数据库显示到网页(页面名称为manageexam.php)
代码如下: manageexam.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Admin | Manage Exam</title>
<link rel="stylesheet" type="text/css" href="style1.css">
<style>
.active3{
color:#900;
}
</style>
</head>
<body>
<?php include"livetime.php";?>
<table class="table">
<tr>
<th class="th" align="left" colspan="2" >
<?php
session_start();
if($_SESSION['username'])
echo "<span id='welcome'>Congratulation, <span id='company'> ".$_SESSION['username']."</span> you are logged in!</span>";
else
die("You Must be logged in!");
?>
<span class="clock"><span id="clockbox"></span></span></th>
</tr>
<tr>
<td valign="top" class="tdleft"><br>
<span class="message">Admin Controller</span>
<?php include('menu.php');?>
</td>
<td bgcolor="#FFFFCC" valign="top" style="padding:5px;">
<h2>Manage Exams Available:</h2>
<?php
include('dbconfig.php');
$query = mysql_query("SELECT * FROM examsmeta");
$numrows = mysql_num_rows($query);
echo "<strong>Total Exams Available: $numrows </strong>";
echo "<br>";
echo "<table class='table2'>
<tr>
<th width='30%'>Subject Name</th>
<th width='60%'>Description</th>
<th width='30%'>Select</th>
</tr>
<form action= 'manageexam.php' method='post'>";
while($row = mysql_fetch_array($query))
{
echo "<tr>";
echo "<td>" .$row[1]. "</td>";
echo "<td>" .$row[2]. "</td>";
echo "<td><input name='select' type='checkbox' value=".$row[1]."></td>";
echo "</tr>";
}
echo "</table><br>";
echo "<input class='bttn' type='submit' value='Delete Exam' name='delete'>";
echo " <input class='bttn' type='submit' value='Edit Exam' name='edit' > ";
echo "</form>"
?>
</td>
</tr>
<tr>
<td class="td" colspan="2" height="10%">
Status Bar:
<span id="black">
<?php
if(!isset($_REQUEST['logout']))
{
include('delete.php');
if(isset($_POST['edit'])){
header('location:editexam.php?id='.$_POST['select']);
}
}
else
{
echo $_REQUEST['logout'];
}
?>
</span>
<span class="logout"><a href="logout-handler.php">LOGOUT</a></span>
</td>
</tr>
</table>
</body>
</html>
现在，在此页面上，我在每个考试前面添加了复选框和两个按钮，一个用于永久删除考试，第二个用于编辑考试。在编辑考试时每当我选择任何一项考试(通过复选框)并单击编辑时，都会显示以下结果(显示选择考试商业的示例):
Unknown column 'Commerce' in 'where clause'
editexam.php代码如下:
<?php
include('dbconfig.php');
if(isset($_REQUEST['id'])){
if($_REQUEST['id']=='')
{
header('location:manageexam.php?message2=Error: Please select a Value!');
}
else{
$id=$_REQUEST['id'];
$query="select * from examsmeta where SubId=".$id;
$res=mysql_query($query) or die(mysql_error());
$row=mysql_fetch_assoc($res);
}
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Admin |Edit Exam</title>
<link rel="stylesheet" type="text/css" href="style1.css">
<link rel="stylesheet" type="text/css" href="datepickr.css" />
<style>
.active5{
color:#900;}
</style>
</head>
<body>
<!--text editor.-->
<script type="text/javascript" src="tinymce/tinymce.min.js"></script>
<script type="text/javascript">tinymce.init({
selector: "textarea",
// ===========================================
// INCLUDE THE PLUGIN
// ===========================================
plugins: [
"advlist autolink lists link image charmap print preview anchor",
"searchreplace visualblocks code fullscreen",
"insertdatetime media table contextmenu paste jbimages"
],
// ===========================================
// PUT PLUGIN'S BUTTON on the toolbar
// ===========================================
toolbar: "insertfile undo redo | styleselect | bold italic | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | link image jbimages",
// ===========================================
// SET RELATIVE_URLS to FALSE (This is required for images to display properly)
// ===========================================
relative_urls: false
});</script>
<!--text editor script close-->
<?php include('livetime.php');?>
<table width="100%" class="table">
<tr>
<th class="th" align="left" colspan="2" >
<?php
session_start();
if($_SESSION['username'])
echo "<span id='welcome'>Congratulation, <span id='company'> ".$_SESSION['username']."</span> you are logged in!</span>";
else
die("You Must be logged in!");
?>
<span class="clock"><span id="clockbox"></span></span></th>
</tr>
<tr>
<td valign="top" class="tdleft"><br>
<span class="message"> Admin Controller</span>
<?php include('menu.php');?>
</td>
<td bgcolor="#FFFFCC" valign="top" style="padding:5px;">
<h2>Edit Exams Available </h2>
<form id="regform" action="" method="post">
<div class="wrapper">
<strong>Subject Name: </strong>
<div class="bg">
<input class="input" type="text" value="<?php if(isset($_REQUEST['id'])){
echo $row['name'];
}
?>" name="name"/>
</div>
</div>
<div class="wrapper">
<strong>Description:</strong>
<div class="bg">
<textarea class="textbox" name="description">
<?php if(isset($_REQUEST['id']))
{
echo $row['description'];
} ?>
</textarea>
<input type="hidden" name="id" value="<?php echo $_REQUEST['id'];?>" />
</div>
</div>
<br>
<div class="bttnalign"><a href="editexam.php?id=0"><input class="bttn" type="button" value="Clear">
<input class="bttn" type="submit" name="submit" value="Update"/>
</a>
</div>
</form>
</td>
</tr>
<tr>
<td class="td" colspan="2" height="10%">
Status Bar:
<span id="black">
<?php
if(isset($_POST['submit']))
{
$na=$_POST['name'];
$nad=$_POST['description'];
$rid=$_POST['id'];
$nupdate=mysql_query("UPDATE examsmeta SET Name='".$na."',Description='".$nad."' WHERE SubId='".$rid."'") or die(mysql_error());
header("location:manageexam.php?message2=Data Updated Successfully!");
}
?>
</span>
<span class="logout"><a href="logout-handler.php">LOGOUT</a></span>
</td>
</tr>
</table>
<!--Date Picker-->
<script type="text/javascript" src="datepickr.min.js"></script>
<script type="text/javascript">
new datepickr('datepick', {
'dateFormat': 'm/d/Y'
});
</script>
<!--Date Picker closed-->
</body>
</html>
我做错了什么，请解释一下吗？
最佳答案
您正在传递 $row[1] 作为参数，我假设它是具有名称的列。
更改以下代码:
echo "<td><input name='select' type='checkbox' value=".$row[1]."></td>";
到
echo "<td><input name='select' type='checkbox' value=".$row[0]."></td>";
这将通过参数传递 id，(我假设 id 列位于 0 位置)/
关于php - 编辑值在 php 中无法正常工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21794071/