/**
 * 总接口
 * @param $dir_path 需要压缩的目录地址（绝对路径）
 * @param $zipName 需要生成的zip文件名（绝对路径）
 */
function zip($dir_path,$zipName){
  $relationArr = [$dir_path=>[
    'originName'=>$dir_path,
    'is_dir' => true,
    'children'=>[]
  ]];
  modifiyFileName($dir_path,$relationArr[$dir_path]['children']);
  $zip = new ZipArchive();
  $zip->open($zipName,ZipArchive::CREATE);
  zipDir(array_keys($relationArr)[0],'',$zip,array_values($relationArr)[0]['children']);
  $zip->close();
  restoreFileName(array_keys($relationArr)[0],array_values($relationArr)[0]['children']);
}

/**
 * 递归添加文件进入zip
 * @param $real_path 在需要压缩的本地的目录
 * @param $zip_path zip里面的相对目录
 * @param $zip ZipArchive对象
 * @param $relationArr 目录的命名关系
 */
function zipDir($real_path,$zip_path,$zip,$relationArr){
  $sub_zip_path = empty($zip_path)?'':$zip_path.'\\';
  if (is_dir($real_path)){
    foreach($relationArr as $k=>$v){
      if($v['is_dir']){ //是文件夹
        $zip->addEmptyDir($sub_zip_path.$v['originName']);
        zipDir($real_path.'\\'.$k,$sub_zip_path.$v['originName'],$zip,$v['children']);
      }else{ //不是文件夹
        $zip->addFile($real_path.'\\'.$k,$sub_zip_path.$k);
        $zip->deleteName($sub_zip_path.$v['originName']);
        $zip->renameName($sub_zip_path.$k,$sub_zip_path.$v['originName']);
      }
    }
  }
}

/**
 * 递归将目录的文件名更改为随机不重复编号，然后保存原名和编号关系
 * @param $path 本地目录地址
 * @param $relationArr 关系数组
 * @return bool
 */
function modifiyFileName($path,$relationArr){
  if(!is_dir($path) || !is_array($relationArr)){
    return false;
  }
  if($dh = opendir($path)){
    $count = 0;
    while (($file = readdir($dh)) !== false){
      if(in_array($file,['.','..',null])) continue; //无效文件，重来
      if(is_dir($path.'\\'.$file)){
        $newName = md5(rand(0,99999).rand(0,99999).rand(0,99999).microtime().'dir'.$count);
        $relationArr[$newName] = [
          'originName' => iconv('GBK','UTF-8',$file),
          'is_dir' => true,
          'children' => []
        ];
        rename($path.'\\'.$file, $path.'\\'.$newName);
        modifiyFileName($path.'\\'.$newName,$relationArr[$newName]['children']);
        $count++;
      }
      else{
        $extension = strchr($file,'.');
        $newName = md5(rand(0,99999).rand(0,99999).rand(0,99999).microtime().'file'.$count);
        $relationArr[$newName.$extension] = [
          'originName' => iconv('GBK','UTF-8',$file),
          'is_dir' => false,
          'children' => []
        ];
        rename($path.'\\'.$file, $path.'\\'.$newName.$extension);
        $count++;
      }
    }
  }
}

/**
 * 根据关系数组，将本地目录的文件名称还原成原文件名
 * @param $path 本地目录地址
 * @param $relationArr 关系数组
 */
function restoreFileName($path,$relationArr){
  foreach($relationArr as $k=>$v){
    if(!empty($v['children'])){
      restoreFileName($path.'\\'.$k,$v['children']);
      rename($path.'\\'.$k,iconv('UTF-8','GBK',$path.'\\'.$v['originName']));
    }else{
      rename($path.'\\'.$k,iconv('UTF-8','GBK',$path.'\\'.$v['originName']));
    }
  }
}