mysql上传图片后显示

<?php
// 连接数据库
$conn = new mysqli('localhost', 'username', 'password', 'database');

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// 检查文件上传
if ($_FILES['image']['error'] == UPLOAD_ERR_OK) {
    $imagePath = $_FILES['image']['tmp_name'];
    $imageName = $_FILES['image']['name'];
    $imageSize = $_FILES['image']['size'];
    $imageType = $_FILES['image']['type'];

    // 读取图片数据
    $imageData = file_get_contents($imagePath);

    // 插入数据库
    $stmt = $conn->prepare("INSERT INTO images (name, type, size, data) VALUES (?, ?, ?, ?)");
    $stmt->bind_param("siss", $imageName, $imageType, $imageSize, $imageData);
    $stmt->execute();
}

// 显示图片
if (isset($_GET['id'])) {
    $id = $_GET['id'];
    $stmt = $conn->prepare("SELECT data FROM images WHERE id = ?");
    $stmt->bind_param("i", $id);
    $stmt->execute();
    $stmt->bind_result($imageData);
    if ($stmt->fetch()) {
        header('Content-Type: ' . $imageType);
        echo $imageData;
    }
}
?>

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

<!-- 显示图片 -->
<img src="display.php?id=1">