[游戏开发]递归获取文件夹和文件

效果图：


try
{
    $directories = new FileSystem('C:\Program Files (x86)\Windows NT');
    $files = $directories->getFiles();
    var_dump($files);
} catch (Exception $e) {

}

class FileSystem
{
    /**
     * 文件名称升序
     * @var int
     */
    public const SORT_ASC = 1;

    /**
     * 文件名称降序
     * @var int
     */
    public const SORT_DESC = 0;

    /**
     * @var string $dir
     */
    private  $directory;

    /**
     * FileSystem constructor.
     * @param string $directory
     */
    public function __construct(string $directory)
    {
        $this->directory = $directory;
    }

    /**
     * @return array
     * @throws Exception
     */
    public function getFiles() : array
    {
        $files = [];
        $directory = $this->directory;
        foreach ( $directories = self::getDirectories($directory, self::SORT_ASC) as $directory)
        {
            $fileSystemIterator = new \FilesystemIterator($directory);
            /**
             * @var $fileInfo SplFileInfo
             */
            foreach ($fileSystemIterator as $fileInfo)
            {
                // 文件内容是否为空
                if ($fileInfo->getSize() > 0 && $fileInfo->isFile()) {
                    $files[] = sprintf("%s%s%s", $directory, self::separator() , $fileInfo->getFilename());
                }
            }
        }

        return $files;
    }

    public static function separator()
    {
        return PHP_OS === 'WINNT'? '\\':DIRECTORY_SEPARATOR;
    }

    /**
     * @param string $dir
     * @param int $sort
     * @return array
     * @throws Exception
     */
    public static function getDirectories(string $dir, $sort = self::SORT_DESC) : array
    {
        $dirs = [];
        $directories = scandir($dir,$sort);
        if ($directories === false) {
            throw new Exception('open dir fail.');
        }

        foreach ($directories as $dirname) {
            if ($dirname === '.' || $dirname === '..') {
                continue;
            }
            $directory = "{$dir}".self::separator()."{$dirname}";
            if (is_dir($directory))
            {
                $dirs[] = $directory;
                $dirs =  array_merge($dirs, self::getDirectories($directory));
            }
        }
        return $dirs;
    }
}