dedecms 批量生成缩略图

<?php
// 设置图片目录
$image_dir = 'uploads/';
$thumbnail_dir = 'uploads/thumbnails/';

// 确保缩略图目录存在
if (!file_exists($thumbnail_dir)) {
    mkdir($thumbnail_dir);
}

// 获取图片列表
$images = glob($image_dir . '*.{jpg,png,gif}', GLOB_BRACE);

foreach ($images as $image) {
    $image_name = basename($image);
    $thumbnail_path = $thumbnail_dir . $image_name;

    // 获取图片信息
    list($width, $height) = getimagesize($image);

    // 创建缩略图
    $thumbnail_width = 100;
    $thumbnail_height = 100;

    // 创建目标图片资源
    $thumbnail = imagecreatetruecolor($thumbnail_width, $thumbnail_height);

    // 根据图片类型创建源图片资源
    $image_type = exif_imagetype($image);
    switch ($image_type) {
        case IMAGETYPE_JPEG:
            $source = imagecreatefromjpeg($image);
            break;
        case IMAGETYPE_PNG:
            $source = imagecreatefrompng($image);
            break;
        case IMAGETYPE_GIF:
            $source = imagecreatefromgif($image);
            break;
    }

    // 生成缩略图
    imagecopyresampled($thumbnail, $source, 0, 0, 0, 0, $thumbnail_width, $thumbnail_height, $width, $height);

    // 保存缩略图
    switch ($image_type) {
        case IMAGETYPE_JPEG:
            imagejpeg($thumbnail, $thumbnail_path);
            break;
        case IMAGETYPE_PNG:
            imagepng($thumbnail, $thumbnail_path);
            break;
        case IMAGETYPE_GIF:
            imagegif($thumbnail, $thumbnail_path);
            break;
    }

    // 释放资源
    imagedestroy($source);
    imagedestroy($thumbnail);
}
?>