[PHP知识库]调用PHP原生实现图片压缩包下载并分包

需求描述:

? ?根据记录类型对图片实现分包处理并以压缩包形式实现下载

示例代码:

? ??

 public static function downloadZip($files,$fileName = 'time'){
        if (!is_array($files)){
            return false;
        }

        set_time_limit(1200);
        $zip_name = "示例";
        $zip = new \ZipArchive();

        if ($zip->open($zip_name, \ZipArchive::CREATE) !== TRUE) {
            exit ('无法打开文件，或者文件创建失败');
        }
        $folders = [];
        foreach($files as $key => $file){
            //判断结转单类型进行分包存储 1: VIP签收单  2:整体结课单 3:排版确认单
            $dir = './over-images';
            if(!file_exists($dir)){
                mkdir($dir);
            }
            if($file["type"] == 1){
                $dir = './over-images/Vip';
            }
            if($file["type"] == 2){
                $dir = './over-images/EndClass';
            }
            if($file["type"] == 3){
                $dir = './over-images/TypeConfirm';
            }
            //类型文件夹不存在,创建
            if(!file_exists($dir)){
                mkdir($dir);
            }
            //存储文件到临时文件夹
            $file_remote_url = self::getImg($file['url']);
            $fileContent     = file_get_contents($file_remote_url);
            $file_name = iconv('utf-8', 'GBK', basename($file['url']));
            //处理文件名:加标识(分包后不知图片对应哪条数据)
            $file_name_array = explode('.',$file_name);
            $file_front = $file['num'];
            $file_name  = $file_front.'.'.$file_name_array[1];
            file_put_contents($dir.'/'.$file_name,$fileContent);
            $folders[] = [
                'name'=>$file_name,
                'src' =>$dir.'/'.$file_name,
                'id'  =>$key+1,
                'type'=>$file['type'],//分组依据不能丢
            ];
        }
        // 图片的路径，可以是多个文件
        $object = $zip->open($zip_name, \ZipArchive::CREATE);//创建zip压缩对象
        if($object){
            foreach ($folders as $folder) {
                $zip_dir = "VIP签收单/";
                if($folder['type'] == 1){
                    $zip_dir = "VIP签收单/";
                }
                if($folder['type'] == 2){
                    $zip_dir = "整体结课单/";
                }
                if($folder['type'] == 3){
                    $zip_dir = "排版确认单/";
                }
                $zip->addFile($folder["src"],$zip_dir.$folder['name']);//文件存入对应文件夹

            }
        }

        $zip->close();
        //清空（擦除）缓冲区并关闭输出缓冲
        ob_end_clean();
        header('Content-Type: application/zip;charset=utf8');
        //下载建好的.zip压缩包
        header("Access-Control-Allow-Origin: *"); // 允许任意域名发起的跨域请求
        header('Access-Control-Allow-Headers: X-Requested-With,X_Requested_With');
        header("Content-Type: application/force-download");//告诉浏览器强制下载
        header("Content-Transfer-Encoding: binary");//声明一个下载的文件
        header('Content-Type: application/zip');//设置文件内容类型为zip
        header('Content-Disposition: attachment; filename='.$fileName.'.zip');//声明文件名
        header('Content-Length: ' . filesize($zip_name));//声明文件大小
        readfile($zip_name);
        unlink($zip_name);
        //干掉临时文件,防止空间占用
        $parent_dir = ["./over-images/Vip/","./over-images/EndClass/","./over-images/TypeConfirm/"];
        foreach($parent_dir as $dir){
            if(file_exists($dir)) {
                if ($dh = opendir($dir)) {
                    while (($file = readdir($dh)) !== false) {
                        if ($file!='.' && $file!='..') {
                            unlink($dir.'/'.$file);
                        }
                    }
                }
                closedir($dh);
            }
        }
        die;
    }

功能效果:

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