PHP实现将多个文件压缩成zip格式并下载到本地的方法示例

发布:smiling　来源: PHP粉丝网　添加日期：2021-09-17 19:09:29　浏览: 评论：0　

这篇文章主要介绍了PHP实现将多个文件压缩成zip格式并下载到本地的方法,涉及php针对文件与目录的读写、判断与zip压缩相关操作技巧,需要的朋友可以参考下。

本文实例讲述了PHP实现将多个文件压缩成zip格式并下载到本地的方法，分享给大家供大家参考，具体如下：

废话不多说，直接上代码

//这里需要注意该目录是否存在，并且有创建的权限

$zipname = 'path/test.zip'

//这是要打包的文件地址数组

$files = array("mypath/test1.txt","mypath/test2.pdf");

$zip = new ZipArchive();

$res = $zip->open($zipname, ZipArchive::CREATE);

if ($res === TRUE) {

foreach ($files as $file) {

//这里直接用原文件的名字进行打包，也可以直接命名，需要注意如果文件名字一样会导致后面文件覆盖前面的文件，所以建议重新命名

$new_filename = substr($file, strrpos($file, '/') + 1);

$zip->addFile($file, $new_filename);

}

}

//关闭文件

$zip->close();

//这里是下载zip文件

header("Content-Type: application/zip");

header("Content-Transfer-Encoding: Binary");

header("Content-Length: " . filesize($zipname));

header("Content-Disposition: attachment; filename=\"" . basename($zipname) . "\"");

readfile($zipname);

exit;

附：这里再为大家提供一个zip压缩类：

<?php

#

# PHPZip v1.2 by Sext (sext@neud.net) 2002-11-18

#   (Changed: 2003-03-01)

#

# 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 ((!emptyempty($dir))&&(!is_array($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

?>

用法：

$zipfiles =array("/root/pooy/test1.txt","/root/pooy/test2.txt");

$z = new PHPZip();

//$randomstr = random(8);

$zipfile = TEMP."/photocome_".$groupid.".zip";

$z->Zip($zipfiles, $zipfile);