php上传图像并与数据库一起显示(错误)

<form action="upload.php" method="post" enctype="multipart/form-data">
  <input type="file" name="image">
  <input type="submit" value="上传">
</form>

<?php
if ($_FILES['image']['error'] === UPLOAD_ERR_OK) {
  $tmp_name = $_FILES['image']['tmp_name'];
  $name = $_FILES['image']['name'];
  move_uploaded_file($tmp_name, 'uploads/' . $name);
  echo '图像上传成功！';
} else {
  echo '图像上传失败！';
}
?>

CREATE TABLE images (
  id INT AUTO_INCREMENT PRIMARY KEY,
  filename VARCHAR(255) NOT NULL,
  filepath VARCHAR(255) NOT NULL
);

<?php
if ($_FILES['image']['error'] === UPLOAD_ERR_OK) {
  $tmp_name = $_FILES['image']['tmp_name'];
  $name = $_FILES['image']['name'];
  move_uploaded_file($tmp_name, 'uploads/' . $name);
  
  // 将图像文件信息插入数据库
  $filename = $name;
  $filepath = 'uploads/' . $name;
  
  $conn = new mysqli('数据库主机', '用户名', '密码', '数据库名');
  $stmt = $conn->prepare('INSERT INTO images (filename, filepath) VALUES (?, ?)');
  $stmt->bind_param('ss', $filename, $filepath);
  $stmt->execute();
  
  echo '图像上传成功！';
} else {
  echo '图像上传失败！';
}
?>

<?php
$conn = new mysqli('数据库主机', '用户名', '密码', '数据库名');
$result = $conn->query('SELECT * FROM images');

while ($row = $result->fetch_assoc()) {
  echo '<img src="' . $row['filepath'] . '" alt="' . $row['filename'] . '">';
}

$conn->close();
?>