dede download.php

// 示例代码：检查文件路径和权限
if (file_exists($filePath) && is_readable($filePath)) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="'.basename($filePath).'"');
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($filePath));
    readfile($filePath);
    exit;
} else {
    echo "文件不存在或无权限访问";
}

// 示例代码：分块下载
$chunkSize = 1024 * 1024; // 1MB
$filePath = 'path/to/file';
$file = fopen($filePath, 'rb');
if ($file) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="'.basename($filePath).'"');
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($filePath));
    while (!feof($file)) {
        echo fread($file, $chunkSize);
        flush();
        ob_flush();
    }
    fclose($file);
}