图片展示网站php源码

// 示例代码：检查文件上传
if ($_FILES['file']['error'] === UPLOAD_ERR_OK) {
    $fileTmpPath = $_FILES['file']['tmp_name'];
    $fileName = $_FILES['file']['name'];
    $fileSize = $_FILES['file']['size'];
    $fileType = $_FILES['file']['type'];

    // 移动文件到目标目录
    move_uploaded_file($fileTmpPath, 'uploads/' . $fileName);
} else {
    echo "上传失败，请检查文件大小和类型。";
}

// 示例代码：使用GD库压缩图片
$image = imagecreatefromjpeg('path/to/image.jpg');
$imageWidth = imagesx($image);
$imageHeight = imagesy($image);

$newImage = imagecreatetruecolor($imageWidth, $imageHeight);
imagecopyresampled($newImage, $image, 0, 0, 0, 0, $imageWidth, $imageHeight, $imageWidth, $imageHeight);

imagejpeg($newImage, 'path/to/compressed_image.jpg', 75); // 质量设置为75%
imagedestroy($image);
imagedestroy($newImage);

// 示例代码：使用预处理语句防止SQL注入
$stmt = $pdo->prepare('SELECT * FROM images WHERE id = :id');
$stmt->execute(['id' => $imageId]);
$image = $stmt->fetch();