php 生成缩略图类

<?php
class ThumbnailGenerator {
    private $imagePath;
    private $thumbnailPath;
    private $width;
    private $height;

    public function __construct($imagePath, $thumbnailPath, $width, $height) {
        $this->imagePath = $imagePath;
        $this->thumbnailPath = $thumbnailPath;
        $this->width = $width;
        $this->height = $height;
    }

    public function generate() {
        $image = imagecreatefromjpeg($this->imagePath);
        if (!$image) {
            throw new Exception("Failed to load image: " . $this->imagePath);
        }

        $thumbnail = imagecreatetruecolor($this->width, $this->height);
        imagecopyresampled($thumbnail, $image, 0, 0, 0, 0, $this->width, $this->height, imagesx($image), imagesy($image));

        if (!imagejpeg($thumbnail, $this->thumbnailPath)) {
            throw new Exception("Failed to save thumbnail: " + $this->thumbnailPath);
        }

        imagedestroy($image);
        imagedestroy($thumbnail);
    }
}

// 使用示例
$generator = new ThumbnailGenerator('path/to/image.jpg', 'path/to/thumbnail.jpg', 100, 100);
$generator->generate();
?>