如何对上传为usermeta的用户照片使用thumbnail_size

// 假设$uploadedImage是用户上传的照片
$uploadedImage = $_FILES['photo']['tmp_name'];

// 生成唯一的文件名
$filename = uniqid() . '.jpg';

// 保存原始照片
$originalPath = '/path/to/save/original/' . $filename;
move_uploaded_file($uploadedImage, $originalPath);

// 创建缩略图
$thumbnailPath = '/path/to/save/thumbnail/' . $filename;
$thumbnailSize = 200; // 缩略图尺寸
$sourceImage = imagecreatefromjpeg($originalPath);
$sourceWidth = imagesx($sourceImage);
$sourceHeight = imagesy($sourceImage);
$thumbnailWidth = $thumbnailSize;
$thumbnailHeight = floor($sourceHeight * ($thumbnailSize / $sourceWidth));
$thumbnailImage = imagecreatetruecolor($thumbnailWidth, $thumbnailHeight);
imagecopyresampled($thumbnailImage, $sourceImage, 0, 0, 0, 0, $thumbnailWidth, $thumbnailHeight, $sourceWidth, $sourceHeight);
imagejpeg($thumbnailImage, $thumbnailPath);

// 将缩略图路径保存到用户的usermeta中
update_user_meta($userId, 'thumbnail', $thumbnailPath);