如何用图像更新文本表单
我正在尝试用图像更新文本，现在这段代码可以很好地处理文本，也可以完美地更新图像
但图像未在编辑中显示
示例编辑表单
- 名称：演示
- 父亲姓名：demo
地址：演示
照片 - 选择文件 - 我想要这里的图像名称，如 photo.jpg
图像也存在于数据库中，但未在此处以编辑形式显示
我该怎么做请告诉我解决这个问题谢谢
这是表单代码
<form action="" method="post" enctype="multipart/form-data">
<input type="hidden" name="id" value="<?php echo $id; ?>"/>
<div>
<p><strong>ID:</strong> <?php echo $id; ?></p>
<div>
<p><span class="style9"><strong>Teacher No:</strong></span><strong> *</strong>
<input name="teacherno" type="text" value="<?php echo $teacherno; ?>" size="50" />
</p>
<p><span class="style9"><strong>Teacher Name:</strong></span><strong> *</strong>
<input name="name" type="text" value="<?php echo $name; ?>" size="50" />
</p>
<p><span class="style9"><strong>Education:</strong></span><strong> *</strong>
<input name="education" type="text" value="<?php echo $education; ?>" size="50" />
</p>
<p><span class="style9"><strong>Father Name:</strong></span><strong> *</strong>
<input name="fathername" type="text" value="<?php echo $fathername; ?>" size="50" />
</p>
<p><span class="style9"><strong>Salary:</strong></span><strong> *</strong>
<input name="salary" type="text" value="<?php echo $salary; ?>" size="50" />
</p>
<p><span class="style9"><strong>Date Of Birth :</strong></span><strong> *</strong>
<input name="age" type="text" value="<?php echo $age; ?>" size="50" />
</p>
<p><span class="style9"><strong>Teach Class :</strong></span><strong> *</strong>
<input name="classteacher" type="text" value="<?php echo $classteacher; ?>" size="50" />
</p>
<p><span class="style9"><strong>Phone No :</strong></span><strong> *</strong>
<input name="phone" type="text" value="<?php echo $phone; ?>"/>
</p>
<p><span class="style9"><strong>Date Of Join :</strong></span><strong> *</strong>
<input id="fullDate" name="dateofjoin" type="text" value="<?php echo $dateofjoin; ?>" size="50" />
</p>
<p><span class="style9"><strong>Home Address :</strong></span><strong> *</strong>
<textarea name="address" cols="50"><?php echo $address; ?></textarea>
</p>
<p><span class="style9"><strong>N.I.C No:</strong></span><strong> *</strong>
<input name="nic" type="text" value="<?php echo $nic; ?>" size="50" />
</p>
<span class="style9"><strong>Branch:</strong></span><strong> *</strong>
<input name="branch" type="text" value="<?php echo $branch; ?>" size="50">
<span class="style9"><strong>Photo:</strong></span><strong> *</strong>
<input type="hidden" name="size" value="<?php echo $photo; ?>" size="50">
<input type="file" name="photo">
<br/>
<p class="style1">* required</p>
<input type="submit" name="submit" value="Submit">
</div>
</form>
这是php代码
<?php
}
//This is the directory where images will be saved
$target = "images/";
$target = $target . basename( $_FILES['photo']['name']);
//This gets all the other information from the form
$photo=($_FILES['photo']['name']);
//Writes the photo to the server
if(move_uploaded_file($_FILES['photo']['tmp_name'], $target))
{
//Tells you if its all ok
echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded, and your information has been added to the directory";
}
// connect to the database
include('connect-db.php');
// check if the form has been submitted. If it has, process the form and save it to the database
if (isset($_POST['submit']))
{
// confirm that the 'id' value is a valid integer before getting the form data
if (is_numeric($_POST['id']))
{
// get form data, making sure it is valid
$id = $_POST['id'];
$teacherno = mysql_real_escape_string(htmlspecialchars($_POST['teacherno']));
$name = mysql_real_escape_string(htmlspecialchars($_POST['name']));
$education = mysql_real_escape_string(htmlspecialchars($_POST['education']));
$salary = mysql_real_escape_string(htmlspecialchars($_POST['salary']));
$classteacher = mysql_real_escape_string(htmlspecialchars($_POST['classteacher']));
$dateofjoin = mysql_real_escape_string(htmlspecialchars($_POST['dateofjoin']));
$nic = mysql_real_escape_string(htmlspecialchars($_POST['nic']));
$address = mysql_real_escape_string(htmlspecialchars($_POST['address']));
$age = mysql_real_escape_string(htmlspecialchars($_POST['age']));
$fathername = mysql_real_escape_string(htmlspecialchars($_POST['fathername']));
$phone = mysql_real_escape_string(htmlspecialchars($_POST['phone']));
$branch = mysql_real_escape_string(htmlspecialchars($_POST['branch']));
$photo = mysql_real_escape_string(htmlspecialchars($_FILES['photo']['name']));
// check that firstname/lastname fields are both filled in
if ($teacherno == '' || $name == '')
{
// generate error message
$error = 'ERROR: Please fill in all required fields!';
//error, display form
renderForm($id, $teacherno, $name, $education, $salary, $classteacher, $dateofjoin, $nic, $address, $age, $fathername, $phone, $branch, $photo, $error);
}
else
{
// save the data to the database
mysql_query("UPDATE teacher SET teacherno='$teacherno', name='$name', education='$education', salary='$salary', classteacher='$classteacher', dateofjoin='$dateofjoin', nic='$nic', address='$address', age='$age', phone='$phone', branch='$branch', photo='$photo' WHERE id='$id'")
or die(mysql_error());
// once saved, redirect back to the view page
header("Location: view.php");
}
}
else
{
// if the 'id' isn't valid, display an error
echo 'Error!';
}
}
else
// if the form hasn't been submitted, get the data from the db and display the form
{
// get the 'id' value from the URL (if it exists), making sure that it is valid (checing that it is numeric/larger than 0)
if (isset($_GET['id']) && is_numeric($_GET['id']) && $_GET['id'] > 0)
{
// query db
$id = $_GET['id'];
$result = mysql_query("SELECT * FROM teacher WHERE id=$id")
or die(mysql_error());
$row = mysql_fetch_array($result);
// check that the 'id' matches up with a row in the databse
if($row)
{
// get data from db
$teacherno = $row['teacherno'];
$name = $row['name'];
$education = $row['education'];
$salary = $row['salary'];
$classteacher = $row['classteacher'];
$dateofjoin = $row['dateofjoin'];
$nic = $row['nic'];
$address = $row['address'];
$age = $row['age'];
$fathername = $row['fathername'];
$phone = $row['phone'];
$branch = $row['branch'];
$photo = $row['photo'];
// show form
renderForm($id, $teacherno, $name, $education, $salary, $classteacher, $dateofjoin, $nic, $address, $age, $fathername, $phone, $branch, $photo, '');
}
else
// if no match, display result
{
echo "No results!";
}
}
else
// if the 'id' in the URL isn't valid, or if there is no 'id' value, display an error
{
echo 'Error!';
}
}
?>