一个php自动备份网站文件的程序源码

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cbhjatarj 2013-03-21 17:30:14

filefilters = explode('|',$filetype);
        }

  //返回文件的修改时间格式.
  //只为本类内部函数调用.
  function unix2DosTime($unixtime = 0)
  {
    $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
    if ($timearray['year'] < 1980)
    {
      $timearray['year']        = 1980;
      $timearray['mon']         = 1;
      $timearray['mday']        = 1;
      $timearray['hours']     = 0;
      $timearray['minutes'] = 0;
      $timearray['seconds'] = 0;
    }
    return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |    ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
  }

  //初始化文件,建立文件目录,
  //并返回文件的写入权限.
  function startfile($path = 'dodo.zip')
  {
    $this->gzfilename=$path;
    $mypathdir=array();

    do
    {
      $mypathdir[] = $path = dirname($path);
    }  while($path != '.');

    @end($mypathdir);

    do
    {
      $path = @current($mypathdir);
      @mkdir($path);
    }  while(@prev($mypathdir));

    if($this->fp=@fopen($this->gzfilename,"w"))
    {
      return true;
    }

    return false;
  }

  //添加一个文件到 zip 压缩包中.
  function addfile($data, $name)
  {
    $name = str_replace('\\', '/', $name);
    if(strrchr($name,'/')=='/')
      return $this->adddir($name);
    if(!empty($this->filefilters))
    {
      if (!in_array(end(explode(".",$name)), $this->filefilters))
      {
        return;
      }
    }
    $dtime = dechex($this->unix2DosTime());
    $hexdtime = '\x' . $dtime[6] . $dtime[7] . '\x' . $dtime[4] . $dtime[5] . '\x' . $dtime[2] . $dtime[3] . '\x' . $dtime[0] . $dtime[1];
    eval（'$hexdtime = "' . $hexdtime . '";');

    $unc_len = strlen($data);
    $crc    = crc32($data);
    $zdata     = gzcompress($data);
    $c_len     = strlen($zdata);
    $zdata     = substr(substr($zdata, 0, strlen($zdata) - 4), 2);

    //新添文件内容格式化:
    $datastr    = "\x50\x4b\x03\x04";
    $datastr .= "\x14\x00";                        // ver needed to extract
    $datastr .= "\x00\x00";                        // gen purpose bit flag
    $datastr .= "\x08\x00";                        // compression method
    $datastr .= $hexdtime;                         // last mod time and date
    $datastr .= pack('V', $crc);                         // crc32
    $datastr .= pack('V', $c_len);                     // compressed filesize
    $datastr .= pack('V', $unc_len);                 // uncompressed filesize
    $datastr .= pack('v', strlen($name));        // length of filename
    $datastr .= pack('v', 0);                                // extra field length
    $datastr .= $name;
    $datastr .= $zdata;
    $datastr .= pack('V', $crc);                                 // crc32
    $datastr .= pack('V', $c_len);                             // compressed filesize
    $datastr .= pack('V', $unc_len);                         // uncompressed filesize
    fwrite($this->fp,$datastr); //写入新的文件内容
    $my_datastr_len = strlen($datastr);
    unset($datastr);

    //新添文件目录信息
    $dirstr    = "\x50\x4b\x01\x02";
    $dirstr .= "\x00\x00";                                 // version made by
    $dirstr .= "\x14\x00";                                 // version needed to extract
    $dirstr .= "\x00\x00";                                 // gen purpose bit flag
    $dirstr .= "\x08\x00";                                 // compression method
    $dirstr .= $hexdtime;                                    // last mod time & date
    $dirstr .= pack('V', $crc);                        // crc32
    $dirstr .= pack('V', $c_len);                    // compressed filesize
    $dirstr .= pack('V', $unc_len);                // uncompressed filesize
    $dirstr .= pack('v', strlen($name) );    // length of filename
    $dirstr .= pack('v', 0 );                            // extra field length
    $dirstr .= pack('v', 0 );                            // file comment length
    $dirstr .= pack('v', 0 );                            // disk number start
    $dirstr .= pack('v', 0 );                            // internal file attributes
    $dirstr .= pack('V', 32 );                         // external file attributes - 'archive' bit set
    $dirstr .= pack('V',$this->datastr_len ); // relative offset of local header
    $dirstr .= $name;
    $this->dirstr .= $dirstr; //目录信息
    $this -> file_count ++;
    $this -> dirstr_len += strlen($dirstr);
    $this -> datastr_len += $my_datastr_len;
  }

  function adddir($name)
  {
    $name = str_replace("\\", "/", $name);
    $datastr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
    $datastr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
    $datastr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).pack("V", 0);
    fwrite($this->fp,$datastr); //写入新的文件内容
    $my_datastr_len = strlen($datastr);
    unset($datastr);
    $dirstr = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
    $dirstr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
    $dirstr .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 );
    $dirstr .= pack("V", 16 ).pack("V",$this->datastr_len).$name;
    $this->dirstr .= $dirstr; //目录信息
    $this -> file_count ++;
    $this -> dirstr_len += strlen($dirstr);
    $this -> datastr_len += $my_datastr_len;
  }

  function createfile()
  {
    //压缩包结束信息,包括文件总数,目录信息读取指针位置等信息
    $endstr = "\x50\x4b\x05\x06\x00\x00\x00\x00" .
    pack('v', $this -> file_count) .
    pack('v', $this -> file_count) .
    pack('V', $this -> dirstr_len) .
    pack('V', $this -> datastr_len) .
    "\x00\x00";
    fwrite($this->fp,$this->dirstr.$endstr);
    fclose($this->fp);
  }
}

if(!trim($_REQUEST[zipname]))
  $_REQUEST[zipname] = "dodozip.zip";
else
  $_REQUEST[zipname] = trim($_REQUEST[zipname]);

if(!strrchr(strtolower($_REQUEST[zipname]),'.')=='.zip')
  $_REQUEST[zipname] .= ".zip";

$_REQUEST[todir] = str_replace('\\','/',trim($_REQUEST[todir]));

if(!strrchr(strtolower($_REQUEST[todir]),'/')=='/')
  $_REQUEST[todir] .= "/";

if($_REQUEST[todir]=="/")
  $_REQUEST[todir] = "./";

function listfiles($dir=".")
{
  global $dodozip;
  $sub_file_num = 0;
  if(is_file("$dir"))
  {
    if(realpath($dodozip ->gzfilename)!=realpath("$dir"))
    {
      $dodozip -> addfile(implode('',file("$dir")),"$dir");
      return 1;
    }
    return 0;
  }

  $handle=opendir("$dir");
  while ($file = readdir($handle))
  {
    if($file=="."||$file=="..")
      continue;

    if(is_dir("$dir/$file"))
    {
      $sub_file_num += listfiles("$dir/$file");
    }
    else
    {
      if(realpath($dodozip ->gzfilename)!=realpath("$dir/$file"))
      {
        $dodozip -> addfile(implode('',file("$dir/$file")),"$dir/$file");
        $sub_file_num ++;
      }
    }
  }

  closedir($handle);

  if(!$sub_file_num)
    $dodozip -> addfile("","$dir/");

  return $sub_file_num;
}

function num_bitunit($num)
{
  $bitunit=array(' B',' KB',' MB',' GB');
  for($key=0;$key=pow(2,10*$key)-1)
    { //1023B 会显示为 1KB
      $num_bitunit_str=(ceil($num/pow(2,10*$key)*100)/100)." $bitunit[$key]";
    }
  }
  return $num_bitunit_str;
}

if(is_array($_REQUEST[dfile]))
{
  $dodozip = new PHPzip;
  if($_REQUEST["file_type"] != NULL)
    $dodozip -> SetFileFilter($_REQUEST["file_type"]);
  if($dodozip -> startfile("$_REQUEST[todir]$_REQUEST[zipname]"))
  {
    echo "正在添加压缩文件...

";
    $filenum = 0;
    foreach($_REQUEST[dfile] as $file)
    {
      if(is_file($file))
      {
        if(!empty($dodozip -> filefilters))
          if (!in_array(end(explode(".",$file)), $dodozip -> filefilters))
            continue;
        echo "2    $file
";
      }
      else
      {
        echo "0 $file
";
      }
      $filenum += listfiles($file);
    }
    $dodozip -> createfile();

    echo "
压缩完成,共添加 $filenum 个文件.$_REQUEST[todir]$_REQUEST[zipname] (".num_bitunit(filesize("$_REQUEST[todir]$_REQUEST[zipname]")).")";
  }
  else
  {
    echo "$_REQUEST[todir]$_REQUEST[zipname] 不能写入,请检查路径或权限是否正确.
";
  }
}
?>