php文件压缩之PHPZip类用法实例


Posted in PHP onJune 18, 2015

本文实例讲述了php文件压缩之PHPZip类用法。分享给大家供大家参考。具体如下:

<?php
//
// PHPZip v1.2 by Sext (sext@neud.net) 
//
// Makes zip archive
//
// Based on "Zip file creation class", uses zLib
//
//
class PHPZip
{
function Zip($dir, $zipfilename)
{
    if (@function_exists('gzcompress'))
    {
     $curdir = getcwd();
     if (is_array($dir))
     {
          $filelist = $dir;
     }
     else
     {
      $filelist = $this -> GetFileList($dir);
     }
     if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);
     else chdir($curdir);
     if (count($filelist)>0)
     {
      foreach($filelist as $filename)
      {
          if (is_file($filename))
          {
           $fd = fopen ($filename, "r");
           $content = fread ($fd, filesize ($filename));
           fclose ($fd);
           if (is_array($dir)) $filename = basename($filename);
           $this -> addFile($content, $filename);
          }
      }
      $out = $this -> file();
      chdir($curdir);
      $fp = fopen($zipfilename, "w");
      fwrite($fp, $out, strlen($out));
      fclose($fp);
     }
     return 1;
    }
    else return 0;
}
function GetFileList($dir)
{
    if (file_exists($dir))
    {
     $args = func_get_args();
     $pref = $args[1];
     $dh = opendir($dir);
     while($files = readdir($dh))
     {
      if (($files!=".")&&($files!=".."))
      {
          if (is_dir($dir.$files))
          {
           $curdir = getcwd();
           chdir($dir.$files);
           $file = array_merge($file, $this -> GetFileList("", "$pref$files/"));
           chdir($curdir);
          }
          else $file[]=$pref.$files;
      }
     }
     closedir($dh);
    }
    return $file;
}
var $datasec  = array();
var $ctrl_dir   = array();
var $eof_ctrl_dir = "x50x4bx05x06x00x00x00x00";
var $old_offset = 0;
/**
  * Converts an Unix timestamp to a four byte DOS date and time format (date
  * in high two bytes, time in low two bytes allowing magnitude comparison).
  *
  * @param  integer  the current Unix timestamp
  *
  * @return integer  the current date in a four byte DOS format
  *
  * @access private
  */
function unix2DosTime($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;
     $timearray['seconds'] = 0;
    } // end if
    return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
      ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
} // end of the 'unix2DosTime()' method
/**
  * Adds "file" to archive
  *
  * @param  string file contents
  * @param  string name of the file in the archive (may contains the path)
  * @param  integer  the current timestamp
  *
  * @access public
  */
function addFile($data, $name, $time = 0)
{
    $name   = str_replace('', '/', $name);
 
    $dtime = dechex($this->unix2DosTime($time));
    $hexdtime = 'x' . $dtime[6] . $dtime[7]
        . 'x' . $dtime[4] . $dtime[5]
        . 'x' . $dtime[2] . $dtime[3]
        . 'x' . $dtime[0] . $dtime[1];
    eval('$hexdtime = "' . $hexdtime . '";');
    $fr = "x50x4bx03x04";
    $fr .= "x14x00";     // ver needed to extract
    $fr .= "x00x00";     // gen purpose bit flag
    $fr .= "x08x00";     // compression method
    $fr .= $hexdtime;     // last mod time and date
 
    // "local file header" segment
    $unc_len = strlen($data);
    $crc   = crc32($data);
    $zdata = gzcompress($data);
    $c_len = strlen($zdata);
    $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
    $fr  .= pack('V', $crc);     // crc32
    $fr  .= pack('V', $c_len);      // compressed filesize
    $fr  .= pack('V', $unc_len);    // uncompressed filesize
    $fr  .= pack('v', strlen($name)); // length of filename
    $fr  .= pack('v', 0);       // extra field length
    $fr  .= $name;
    // "file data" segment
    $fr .= $zdata;
    // "data descriptor" segment (optional but necessary if archive is not
    // served as file)
    $fr .= pack('V', $crc);         // crc32
    $fr .= pack('V', $c_len);       // compressed filesize
    $fr .= pack('V', $unc_len);     // uncompressed filesize
    // add this entry to array
    $this -> datasec[] = $fr;
    $new_offset    = strlen(implode('', $this->datasec));
    // now add to central directory record
    $cdrec = "x50x4bx01x02";
    $cdrec .= "x00x00";       // version made by
    $cdrec .= "x14x00";       // version needed to extract
    $cdrec .= "x00x00";       // gen purpose bit flag
    $cdrec .= "x08x00";       // compression method
    $cdrec .= $hexdtime;         // last mod time & date
    $cdrec .= pack('V', $crc);      // crc32
    $cdrec .= pack('V', $c_len);    // compressed filesize
    $cdrec .= pack('V', $unc_len);  // uncompressed filesize
    $cdrec .= pack('v', strlen($name) ); // length of filename
    $cdrec .= pack('v', 0 );     // extra field length
    $cdrec .= pack('v', 0 );     // file comment length
    $cdrec .= pack('v', 0 );     // disk number start
    $cdrec .= pack('v', 0 );     // internal file attributes
    $cdrec .= pack('V', 32 );     // external file attributes - 'archive' bit set
    $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header
    $this -> old_offset = $new_offset;
    $cdrec .= $name;
    // optional extra field, file comment goes here
    // save to central directory
    $this -> ctrl_dir[] = $cdrec;
} // end of the 'addFile()' method
/**
  * Dumps out file
  *
  * @return  string  the zipped file
  *
  * @access public
  */
function file()
{
    $data = implode('', $this -> datasec);
    $ctrldir = implode('', $this -> ctrl_dir);
 
    return
     $data .
     $ctrldir .
     $this -> eof_ctrl_dir .
     pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries "on this disk"
     pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries overall
     pack('V', strlen($ctrldir)) .      // size of central dir
     pack('V', strlen($data)) .       // offset to start of central dir
     "x00x00";               // .zip file comment length
} // end of the 'file()' method
} // end of the 'PHPZip' class
?>

使用方法:

<?php
$z = new PHPZip(); //新建立一个zip的类
//方法一:
$z -> Zip("", "out1.zip"); //添加当前目录和子目录下的所有档案
//方法二:
$files=array('1.txt','gb.txt');
$files[]='5.txt';
$z -> Zip($files, "out2.zip"); //添加文件列表
//方法三:
$z -> Zip("/usr/local/sext/", "out3.zip"); //添加指定目录
?>

希望本文所述对大家的php程序设计有所帮助。

PHP 相关文章推荐
9个PHP开发常用功能函数小结
Jul 15 PHP
JSON在PHP中的应用介绍
Sep 08 PHP
thinkphp 多表 事务详解
Jun 17 PHP
PHP 简易输出CSV表格文件的方法详解
Jun 20 PHP
php实现执行某一操作时弹出确认、取消对话框
Dec 30 PHP
php解压文件代码实现php在线解压
Feb 13 PHP
PHP获取中英混合字符串长度的方法
Jun 07 PHP
PHP简单实现“相关文章推荐”功能的方法
Jul 19 PHP
thinkphp学习笔记之多表查询
Jul 28 PHP
php为字符串前后添加指定数量字符的方法
May 04 PHP
PHP实现执行外部程序的方法详解
Aug 17 PHP
Laravel5.5 动态切换多语言的操作方式
Oct 25 PHP
浅谈php中include文件变量作用域
Jun 18 #PHP
Apache连接PHP后无法启动问题解决思路
Jun 18 #PHP
php实现只保留mysql中最新1000条记录
Jun 18 #PHP
php使用COPY函数更新配置文件的方法
Jun 18 #PHP
ThinkPHP里用U方法调用js文件实例
Jun 18 #PHP
php实现mysql数据库分表分段备份
Jun 18 #PHP
php遍历树的常用方法汇总
Jun 18 #PHP
You might like
php 服务器调试 Zend Debugger 的安装教程
2009/09/25 PHP
php 生成短网址原理及代码
2014/01/23 PHP
php实现解析xml并生成sql语句的方法
2018/02/03 PHP
类似框架的js代码
2006/11/09 Javascript
Prototype 学习 工具函数学习($A方法)
2009/07/12 Javascript
屏蔽Flash右键信息的js代码
2010/01/17 Javascript
JavaScript高级程序设计 读书笔记之十一 内置对象Global
2012/03/07 Javascript
javascript实现tabs选项卡切换效果(扩展版)
2013/03/19 Javascript
Jquery实现弹出层分享微博插件具备动画效果
2013/04/03 Javascript
js禁止页面使用右键(简单示例代码)
2013/11/13 Javascript
jquery checkbox实现单选小例
2013/11/27 Javascript
jQuery实现左右切换焦点图
2015/04/03 Javascript
JavaScritp添加url参数并将参数加入到url中及更改url参数的方法
2015/10/26 Javascript
JavaScript常用数组算法小结
2016/02/13 Javascript
使用struts2+Ajax+jquery验证用户名是否已被注册
2016/03/22 Javascript
Bootstrap table两种分页示例
2016/12/23 Javascript
javascript 中null和undefined区分和比较
2017/04/19 Javascript
详解vue.js 开发环境搭建最简单攻略
2017/06/12 Javascript
微信小程序对接七牛云存储的方法
2017/07/30 Javascript
VUE 3D轮播图封装实现方法
2018/07/03 Javascript
10分钟彻底搞懂Http的强制缓存和协商缓存(小结)
2018/08/30 Javascript
VUE v-model表单数据双向绑定完整示例
2019/01/21 Javascript
JavaScript实现的联动菜单特效示例
2019/07/08 Javascript
Vuex实现数据增加和删除功能
2019/11/11 Javascript
JavaScript交换变量的常用方法小结【4种方法】
2020/05/07 Javascript
解决vue 给window添加和移除resize事件遇到的坑
2020/07/21 Javascript
python安装教程
2018/02/28 Python
Django基础知识与基本应用入门教程
2018/07/20 Python
python将邻接矩阵输出成图的实现
2019/11/21 Python
python 遍历pd.Series的index和value
2019/11/26 Python
SmartBuyGlasses中国:唯视良品(销售名牌太阳镜、墨镜和眼镜框)
2017/07/03 全球购物
销售行政专员职责
2014/01/03 职场文书
学年末自我鉴定
2014/01/21 职场文书
环保建议书200字
2014/05/14 职场文书
2019年消防宣传标语集锦
2019/11/21 职场文书
Pandas实现DataFrame的简单运算、统计与排序
2022/03/31 Python