PHP网站备份程序代码分享


答案：效果图:

PHP代码 
复制代码 代码如下:
 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<title>网站程序备份</title> 
</head> 
<body> 
<form name="myform" method="post" action=""> 
<?php 
error_reporting(E_ALL & ~E_NOTICE); 
ini_set('memory_limit', '2048M'); 
echo "选择要压缩的文件或目录：<br>"; 
$fdir = opendir('./'); 
while($file=readdir($fdir)) 
{ 
if($file=='.'|| $file=='..') 
continue; 
echo "<input name='dfile[]' type='checkbox' value='$file' ".($file==basename(__FILE__)?"":"checked")."> "; 
if(is_file($file)) 
{ 
echo "<font face=\"wingdings\" size=\"5\">2</font>  $file<br>"; 
} 
else 
{ 
echo "<font face=\"wingdings\" size=\"5\">0</font> $file<br>"; 
} 
} 
?> 
<br> 
包含下列文件类型: 
<input name="file_type" type="text" id="file_type" value="" size="50"> 
<font color="red"> 
(文件类型用"|"隔开,默认空则包含任意文件,例:如果需要打包php和jpg文件,则输入"php|jpg") 
</font> 
<br> 
压缩文件保存到目录: 
<input name="todir" type="text" id="todir" value="__dwb2011__" size="15"> 
<font color="red"> 
(留空为本目录,必须有写入权限) 
</font> 
<br> 
压缩文件名称: 
<input name="zipname" type="text" id="zipname" value="dwb2011.zip" size="15"> 
<font color="red"> 
(.zip) 
</font> 
<br> 
<br> 
<input name="myaction" type="hidden" id="myaction" value="dozip"> 
<input type='button' value='反选' onclick='selrev();'> 
<input type="submit" name="Submit" value=" 开始压缩 "> 
<script language='javascript'> 
function selrev() 
{ 
with(document.myform) 
{ 
for(i=0;i<elements.length;i++) 
{ 
thiselm = elements[i]; 
if(thiselm.name.match(/dfile\[]/)) 
thiselm.checked = !thiselm.checked; 
} 
} 
} 
</script> 
<?php 
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 = ''; //该变量只被类外部程序访问 
var $gzfilename; 
var $fp; 
var $dirstr=''; 
var $filefilters = array(); 
function SetFileFilter($filetype) 
{ 
$this->filefilters = explode('|',$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
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