无法更新图像但可以更新详细信息

Question

我正在尝试连同图像一起更新供应商详细信息。详细信息正在更新到数据库中，但图像没有更新——旧照片仍在数据库中。也没有显示错误。代码对我来说看起来不错。请看看并帮助我。我还包括供应商编辑页面代码以便更好地理解。同样的代码非常适用于我的其他页面，但在此页面上，它没有将新图像上传到文件和数据库。

Code.php:

if(isset($_POST['sup_updatebtn'])){

$sup_id=$_POST['sup_update_id'];
$sup_name=$_POST['sup_edit_name'];
$sup_regno=$_POST['sup_edit_regno'];
$sup_address=$_POST['sup_edit_address'];
$sup_phone=$_POST['sup_edit_phone'];
$sup_email=$_POST['sup_edit_email'];


$sup_img_old=$_POST['sup_doc_old'];
$imgFile = $_FILES['sup_doc']['name'];
$tmp_dir = $_FILES['sup_doc']['tmp_name'];
$imgSize = $_FILES['sup_doc']['size'];

   if($imgFile)
{
    $upload_dir = 'sup_upload/'; // upload directory 
    $imgExt = strtolower(pathinfo($imgFile,PATHINFO_EXTENSION)); // get image extension
    $valid_extensions = array('pdf','jpeg', 'jpg', 'png', 'gif'); // valid extensions
    if(in_array($imgExt, $valid_extensions))
    {  
        if(!file_exists("sup_upload/".$imgFile)) {  
            if($imgSize < 5000000)
            {
            unlink($upload_dir.$sup_img_old);
            move_uploaded_file($tmp_dir,$upload_dir.$imgFile);
            }
            else
            {
                $_SESSION['status']="Sorry, your file is too large it should be less then 5MB";
                header("Location:supplier.php");
                        
            }
        }
        else
        {
            $filename=$_FILES['sup_doc']['name'];
            $_SESSION['status']= "Sorry, existing file: $filename";  
            header("Location:supplier.php");
        }    
    }
    else
    {
        $_SESSION['status']= "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";  
                    header("Location:supplier.php");

    } 
}
else
{
 // if no image selected the old image remain as it is.
 $imgFile = $sup_img_old; // old image from database
} 


if(!isset($_SESSION['status']))
{

$query=$conn->prepare("UPDATE supplier SET sup_name=?, sup_regno=?, sup_address=?,sup_phone=?,sup_email=?,sup_doc=? WHERE sup_id=?");
$query->bind_param("sssissi",$sup_name,$sup_regno,$sup_address,$sup_phone,$sup_email,$imgFile,$sup_id);
$query->execute();
if ($query->affected_rows>0)
{
    $_SESSION['success']="Your Data is Updated";
    header("Location:supplier.php");
}
else
{
    $_SESSION['status']="Your Data is NOT Updated";
    header("Location:supplier.php");
}
}
}

Supplier_edit.php

        <div class="modal-body">
            <?php
             
             //DISPLAY or RETRIEVE DATA TO EDIT
            if(isset($_POST['sup_edit_btn']))
            {
                $sup_edit_id= $_POST['sup_edit_id'];
            
                $query="SELECT * FROM supplier WHERE sup_id='$sup_edit_id'";
                $query_run=mysqli_query($conn,$query);

                foreach($query_run as $row)
                {
                    ?>
                    <form action="code.php" method="POST">
                        <input type="hidden" name="sup_update_id" value="<?php echo $row['sup_id']?>">
                        <div class="form-group">
                            <label>Company Name</label>
    <input type="text" name="sup_edit_name" value="<?php echo $row['sup_name']?>" class="form-control">
                        </div>
                        <div class="form-group">
              <label>Registration Number</label>
                            <input type="text" name="sup_edit_regno" value="<?php echo $row['sup_regno']?>" class="form-control" >
                        </div>
                        <div class="form-group">
                            <label>Address</label>
                            <input type="text" name="sup_edit_address" value="<?php echo $row['sup_address']?>" class="form-control" >
                        </div>
                        <div class="form-group">
                            <label>Phone Number</label>
                            <input type="tel" name="sup_edit_phone" value="<?php echo $row['sup_phone']?>" class="form-control" >
                        </div>
                        <div class="form-group">
                            <label>Email Address</label>
                            <input type="email" name="sup_edit_email" value="<?php echo $row['sup_email']?>" class="form-control" >
                        </div>
                            <label>Supplier Document</label>
                        
                        <input type="file" name="sup_doc" id="sup_doc" class="form-control"/>
                        <input type="hidden" name="sup_doc_old" value="<?php echo $row['sup_doc'];?>"/> 


                        </div> 
                      
                        <!-- Display image -->
                        <img src="<?php echo "sup_upload/".$row['sup_doc'];?>" height = 90px width = 90px >
                </br>                      
                        </div>
                        <button type="submit" name="sup_updatebtn" class="btn btn-primary">Update</button>
                        <a href="supplier.php" class="btn btn-danger">Cancel</a>

                </form>
                       <?php }}?> 
        </div>

Answer 1

将 enctype="multipart/form-data" 添加到您的表单中

<form action="code.php" method="POST" enctype="multipart/form-data">

无法更新图像但可以更新详细信息

cant update image but can update the details

html

php

database

mysqli

file-upload