在 DB 列中保存图像 url 路径

Question

我正在通过 php 表格更新注册用户数据库中的姓名、电子邮件。它工作正常。

class.usr.php

public function update($uname,$email, $tax)
    {
    try {
    $stmt = $this->conn->prepare('UPDATE tbl_users SET userName = ?, userEmail = ? , tax = ?  WHERE userID = ? ');
    $stmt->execute(array($uname,$email, $tax , $_SESSION['userSession']));
    return $stmt->fetch();
    } catch(PDOException $e) {
        echo '<p class="bg-danger">'.$e->getMessage().'</p>';
    }

形式

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

Name : 
<input type="text" name="txtuname" value="<?php echo $row['userName'] ?>" /><br/>
Email :
<input type="text" name="txtemail" value="<?php echo $row['userEmail'] ?>" /><br>
Image
<input type="file" name="photo" id="fileSelect"><br> 

<input type="submit" name="submit" value="Save" />

</form>

表单相关代码保存在db

<?php

$user_home = new USER();

if(!$user_home->is_logged_in())
{
    header("Location: index.php");
die();
}

if (isset($_POST['submit'])) {
// new data
$uname = $_POST['txtuname'];
$email = $_POST['txtemail'];
$tax = trim($_POST['tax']); // image url path

$uid = (isset($_SESSION['userSession']) ? intval($_SESSION['userSession']) : 0);

if ($uid > 0 && $user_home->update($uname,$email, $tax, $uid))
{
    header("Location: profile1.php");
   die(); 
}
}

$stmt = $user_home->runQuery("SELECT * FROM tbl_users WHERE userID=:uid");
$stmt->execute(array(":uid"=>$_SESSION['userSession']));
$row = $stmt->fetch(PDO::FETCH_ASSOC);

?>

在此之后，现在我使用以下代码通过相同的 php 表单成功将图像上传到文件夹。

    <?php 
if(isset($_FILES["photo"]["error"])){ 
if($_FILES["photo"]["error"] > 0){ 
echo "Error: " . $_FILES["photo"]["error"] . "<br>"; 

} else{ 
$allowed = array("jpg" => "image/jpg", "jpeg" => "image/jpeg", "gif" => "image/gif", "png" => "image/png"); 
$filename = $_FILES["photo"]["name"]; 
$filetype = $_FILES["photo"]["type"]; 
$filesize = $_FILES["photo"]["size"]; 

// Verify file extension 
$ext = pathinfo($filename, PATHINFO_EXTENSION); 
if(!array_key_exists($ext, $allowed)) die("Error: Please select a valid file format."); 

// Verify file size - 5MB maximum 
$maxsize = 5 * 1024 * 1024; 
if($filesize > $maxsize) die("Error: File size is larger than the allowed limit."); 

// Verify MYME type of the file 
if(in_array($filetype, $allowed)){ 
// Check whether file exists before uploading it 
if(file_exists("upload/" . $_FILES["photo"]["name"])){ 
echo $_FILES["photo"]["name"] . " is already exists."; 

} else{ 
move_uploaded_file($_FILES["photo"]["tmp_name"], "upload/" . $_FILES["photo"]["name"]); 

echo "Your file was uploaded successfully."; 
} 
} else{ 

echo "Error: There was a problem uploading your file - please try again."; 
} 

} 

} else{ 
echo ""; 
} 

?>

现在图像只是保存在文件夹中，我需要的是 我希望将该图像路径保存在数据库中并将该图像路径分配给数据库中的上传用户。 这样一来注册用户可以更新现有图片，但不能再上传一张图片。

我试过下面的代码，但没有用：

<?php
$folder = "upload/"; 
    $file = basename( $_FILES['image']['name']); 
    $full_path = $folder.$file; 
    $tax= $full_path;

    if(in_array($filetype, $allowed)){ 
// Check whether file exists before uploading it 
if(file_exists("upload/" . $_FILES["photo"]["name"])){ 
echo $_FILES["photo"]["name"] . " is already exists."; 

} else{ 
move_uploaded_file($_FILES["photo"]["tmp_name"], "upload/" . $_FILES["photo"]["name"]); 

echo "Your file was uploaded successfully."; 
} 
} else{ 

echo "Error: There was a problem uploading your file - please try again."; 
} 

} 

} else{ 
echo ""; 
} 
?>

数据库列：用户名、用户电子邮件、税、照片

在 google 的帮助下我完成了以上所有工作，我是 php 的新手，所以请帮助我。

Answer 1

添加保存文件的新功能并使用global php var $_FILES

1 将新列添加到您的数据库以存储文件路径，我们将其命名为 photo

2 为您的用户添加新功能 class:

<?php
class User {
...
  const PATH_PHOTOS = '/path/to/photo/folder/';
  const BASE_URL = 'http://YOUR_DOMAIN_NAME:YOUR_PORT/YOUR_PATH/';

  public function add_photo($file)
  {
    $ext = pathinfo($file['name'], PATHINFO_EXTENSION);
    $file['new_name'] = uniqid(rand(), true) . ".$ext";
    if (!$this->_upload_file($file))
      return false;
    return $this->_remove_previous_photo()->_add_file_to_db(self::PATH_PHOTOS .     basename($file['new_name']));
  }

  protected function _remove_previous_photo()
  {
    $photo = $this->get_photo();
    if ($photo)
      unlink($photo);
    return $this;
  }

  public function get_photo()
  {
    global $_SESSION;
    $stmt = $this->conn->prepare('SELECT photo FROM tbl_users WHERE userID = ?     ');
    $stmt->execute(array($_SESSION['userSession']));
    $result = $stmt->fetch();
    return reset($result);
  }

  public function get_photo_url()
  {
    $pathInfo = pathinfo($this->get_photo());
    $last_dir = end(explode(DIRECTORY_SEPARATOR, $pathInfo['dirname']));
    return self::BASE_URL . "$last_dir/" . basename($this->get_photo());
  }

  protected function _upload_file($file)
  {
    $uploadfile = self::PATH_PHOTOS . $file['new_name'];
    return move_uploaded_file($file['tmp_name'], $uploadfile);
  }

  protected function _add_file_to_db($file_path)
  {
    try {
      $stmt = $this->conn->prepare('UPDATE tbl_users SET photo = ? WHERE userID = ? ');
      return $stmt->execute(array($file_path, $_SESSION['userSession']));
    } catch (PDOException $e) {
      echo '<p class="bg-danger">' . $e->getMessage() . '</p>';
    }
  }
...
}
?>

3 主文件应如下所示：

<?php

$user_home = new USER();

if(!$user_home->is_logged_in())
{
    header("Location: index.php");
die();
}

if (isset($_POST['submit'])) {
// new data
$uname = $_POST['txtuname'];
$email = $_POST['txtemail'];
$tax = trim($_POST['tax']); // image url path

$uid = (isset($_SESSION['userSession']) ? intval($_SESSION['userSession']) : 0);

if ($uid > 0 && $user_home->update($uname,$email, $tax, $uid) && $user_home->add_photo($_FILES['photo']))
{
    header("Location: profile1.php");
   die(); 
}
}

$stmt = $user_home->runQuery("SELECT * FROM tbl_users WHERE userID=:uid");
$stmt->execute(array(":uid"=>$_SESSION['userSession']));
$row = $stmt->fetch(PDO::FETCH_ASSOC);

?>

希望对您有所帮助

Answer 2

这是另一个解决方案：

首先手动执行此查询以添加新列：

ALTER TABLE `tbl_users` ADD `photo` VARCHAR(255) NOT NULL ;

那么这是 php 代码：

<?php
$dbConn = new Database();
$dbConn->dbConnection();

$user_home = new USER();

function uploadUserPhoto($uid) {
    global $dbConn;
    if(isset($_FILES["photo"]["error"])) {
        if($_FILES["photo"]["error"] > 0) {
            echo "Error: " . $_FILES["photo"]["error"] . "<br>";

        } else {
            $allowed = array("jpg" => "image/jpg", "jpeg" => "image/jpeg", "gif" => "image/gif", "png" => "image/png");
            $filename = $_FILES["photo"]["name"];
            $filetype = $_FILES["photo"]["type"];
            $filesize = $_FILES["photo"]["size"];

            $userDir = $uid;

            // Verify file extension
            $ext = pathinfo($filename, PATHINFO_EXTENSION);
            if(!array_key_exists($ext, $allowed)) die("Error: Please select a valid file format.");

            // Verify file size - 5MB maximum
            $maxsize = 5 * 1024 * 1024;
            if($filesize > $maxsize) die("Error: File size is larger than the allowed limit.");

            // Verify MYME type of the file
            if(in_array($filetype, $allowed)) {
                if(!is_dir('upload/'.$uid)) {
                    mkdir('upload/'.$uid);
                }

                $photoname = time().$uid.'_photo'.'.'.$ext;

                // delete all the files in this directory
                $files = glob('upload/'.$uid.'/*'); // get all file names
                foreach($files as $file){ // iterate files
                    if(is_file($file))
                        unlink($file); // delete file
                }

                // Upload the photo
                move_uploaded_file($_FILES["photo"]["tmp_name"], "upload/" . $uid . '/'. $photoname);

                $updateData = array(':userID' => $uid, ':photo' => $photoname);
                $stmt = $dbConn->conn->prepare("UPDATE tbl_users SET photo=:photo WHERE userID=:uid");
                $stmt->execute($updateData);

                echo "Your file was uploaded successfully.";
            } else {
                echo "Error: There was a problem uploading your file - please try again.";
            }
        }
    } else {
        echo "";
    }
}

if(!$user_home->is_logged_in())
{
    header("Location: index.php");
    die();
}

if (isset($_POST['submit'])) {
    // new data
    $uname = $_POST['txtuname'];
    $email = $_POST['txtemail'];
    $tax = trim($_POST['tax']); // image url path

    $uid = (isset($_SESSION['userSession']) ? intval($_SESSION['userSession']) : 0);

    if ($uid > 0 && $user_home->update($uname,$email, $tax, $uid))
    {
        uploadUserPhoto($uid);
        header("Location: profile1.php");
        die();
    }
}

$stmt = $user_home->runQuery("SELECT * FROM tbl_users WHERE userID=:uid");
$stmt->execute(array(":uid"=>$_SESSION['userSession']));
$row = $stmt->fetch(PDO::FETCH_ASSOC);
?>

有一个 $dbConnection 变量，它是到数据库的连接，但因为我不知道你的代码的其余部分，你应该用你正确的数据库连接变量替换它。

用户的照片保存在 tbl_users 的 photo 列中，并在 uploads 目录中为每个用户创建子目录。子目录是用户 ID。因此，例如对于 userID = 1 的用户，其上传路径将是 uploads/1/<filename>.

文件名是动态生成的——这样可以避免缓存上传的同名照片……这是更好的方法。

您必须更改显示照片的代码，因为现在它的文件名在数据库中并且上传中有子目录（这是用户的用户 ID）

在 DB 列中保存图像 url 路径

Save image url path in DB columns

php

database

image

imageurl