PHP website backup program code sharing_PHP tutorial

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< title>Website program backup

error_reporting(E_ALL & ~E_NOTICE);
ini_set('memory_limit', '2048M');
echo "Select a file or directory to compress:
";
$fdir = opendir('./');
while($file=readdir($fdir))
{
if($file=='.'|| $file=='. .')
continue;
echo " ";
if(is_file($file))
{
echo "2 $ file
";
}
else
{
echo "0 $file
";
}
}
?>


Contains the following file types:


(File types are separated by "|", the default is empty to include any file, for example: if you need to package php and jpg files, enter "php|jpg")



Save the compressed file to the directory:


(leave blank for this directory, must have write permission)



Compressed file name:


(.zip)








error_reporting(E_ALL & ~E_NOTICE);
set_time_limit(0);
class PHPzip
{
var $file_count = 0;
var $datastr_len = 0;
var $dirstr_len = 0;
var $filedata = ''; //This variable is only accessed by programs outside the class
var $gzfilename;
var $fp;
var $dirstr='';
var $filefilters = array();
function SetFileFilter($filetype)
{
$this->filefilters = explode('|',$filetype);
}
//Return the modification time format of the file.
//Only called for internal functions of this class.
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);
}
//Initialize the file, create the file directory,
//Return the write permission of the file.
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;
}
//Add a file to the zip package.
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 = "x50x4bx03x04";
$datastr .= "x14x00"; // ver needed to extract
$datastr .= "x00x00"; // gen purpose bit flag
$datastr .= "x08x00"; // 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 = "x50x4bx01x02";
$dirstr .= "x00x00"; // version made by
$dirstr .= "x14x00"; // version needed to extract
$dirstr .= "x00x00"; // gen purpose bit flag
$dirstr .= "x08x00"; // 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 = "x50x4bx03x04x0ax00x00x00x00x00x00x00x00x00";
$datastr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($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 = "x50x4bx01x02x00x00x0ax00x00x00x00x00x00x00x00x00";
$dirstr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($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 = "x50x4bx05x06x00x00x00x00" .
pack('v', $this -> file_count) .
pack('v', $this -> file_count) .
pack('V', $this -> dirstr_len) .
pack('V', $this -> datastr_len) .
"x00x00";
fwrite($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;$key{
if($num>=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.
";
}
}
?>

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