php对zip文件解压和压缩

<?php
/**
* @author wyt
*
*/
class zip {
private $_zipObj=null;
private $_zipfcArr=array();
private $_basePath=null;
private $_zipName;
/**
* init
* @param zip文件名称 $zipName
*/
function __construct($zipName){
$this->_zipName=$zipName;
$this->_zipObj=new rezip();
}

/**
* 压缩一个文件夹
* @param 目录名称 $path
*/
public function tozip($path){
$this->_basePath=$path;
$this->_basePath.='/';
$this->direct($path);
$this->_zipObj->Add($this->_zipfcArr,1);
//写入文件
if(@fputs(@fopen($this->_zipName,"wb"),$this->_zipObj->get_file())) return $this->_zipName;
return false;
}

/**
* 解压zip文件
* @param 解压到的文件夹 $destPath
*/
public function unzip($destPath){
if(!file_exists($destPath)) @mkdir($destPath,0777,true);
return $this->_zipObj->Extract($this->_zipName,$destPath);
}

function direct($path){
$handler=opendir($path);
while(($file=readdir($handler))!==false){
if($file=='.'||$file=='..') continue;
$tmp=$path.'/'.$file;
$filename=str_replace($this->_basePath,'',$tmp);
if(is_dir($tmp)){
$this->direct($tmp);
}else{
//生成的zip 文件名
echo $tmp."\n";
$filesize=@filesize($tmp);
$fp=@fopen($tmp,rb);
$this->_zipfcArr[]=Array($filename,@fread($fp,$filesize));
@fclose($fp);
}
}
closedir($handler);
}
}
/**
* 压缩类，进行了小小的改动
*
*/
class rezip{
var $datasec, $ctrl_dir = array();
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old_offset = 0; var $dirs = Array(".");
function get_List($zip_name){
$zip = @fopen($zip_name, 'rb');
if(!$zip) return(0);
$centd = $this->ReadCentralDir($zip,$zip_name);

@rewind($zip);
@fseek($zip, $centd['offset']);

for ($i=0; $i<$centd['entries']; $i++){
$header = $this->Re