将文件夹压缩成zip文件的php代码

　　1.请先下载我准备好的zip.php工具类，下载后解压，将里面的文件放入对应的目录中，我是放在虚拟目录下的include文件夹中。
2.在你的php文件中加入下面代码即可
复制代码 代码如下:
require_once ./include/zip.php;
$zip = new PHPZip();
//$zip -> createZip(要压缩的文件夹目录地址, 压缩后的文件名.zip); //只生成不自动下载
$zip -> downloadZip(要压缩的文件夹目录地址, 压缩后的文件名.zip);//自动下载

实例：可以参考下面的伪代码来看一个具体的使用场景：
代码
复制代码 代码如下:
require_once ./include/zip.php;
if (!$download) {
exit();
}
set_time_limit(60);
$tmpManager = new TmpManager(); //假设我们有一个类来完成后面的操作
$tempfolder = array();
$tempfile = array();
//假设我们是通过在页面上选择checkbox来下载已选的文件夹或文件，并一同打包
for($i = 0;$i < $checkboxnum;$i++) {
$value = ${select.$i};
if ($value != ) {
$this_type = substr($value, 0, 1);
$this_id = substr($value, 1);
//将文件夹和文件的情况分开处理
if ($this_type == d) {
$tempfolder[] = $this_id;
}
elseif ($this_type == f) {
$tempfile[] = $this_id;
}
}
}
@mkdir($tempdir);
$curtempdir = $tempdir/.$userid; //不同用户在不同的临时文件夹下操作
if (file_exists($curtempdir)) {
$tmpManager->DeleteDir($curtempdir); //删除旧的文件夹
}
if (sizeof($tempfolder) > 0 sizeof($tempfile) > 0) {
mkdir($curtempdir, 0777); //如果有要打包的文件货文件夹，重新创建文件夹
}
if (sizeof($tempfile) > 0) {
$tmpManager->CopyFile($tempfile,$curtempdir); //将要下载的文件copy到创建的文件夹
}
if (sizeof($tempfolder) > 0) {
$tmpManager->CopyFolder($tempfolder,$curtempdir); //将要下载的文件夹copy到创建的文件夹
}
$zip = new PHPZip();
$zip -> downloadZip($curtempdir, file_.date(Ymd)..zip); //打包并下载

zip.php
复制代码 代码如下:
<?php
/*
File name: /include/zip.php
Author:Horace 2009/04/15
*/
class PHPZip{
var $dirInfo = array(0,0);
var $rootDir = ;
var $datasec = array();
var $ctrl_dir = array();
var $eof_ctrl_dir = \x50\x4b\x05\x06\x00\x00\x00\x00;
var $old_offset = 0;

function downloadZip(){
createZip($dir, $zipfilename, true);
}
function createZip($dir, $zipfilename, $autoDownload = false){
if (@function_exists(gzcompress)){
@set_time_limit(0);
if (is_array($dir)){
$fd = fopen ($dir, r);
$fileValue = fread ($fd, filesize ($filename));
fclose ($fd);
if (is_array($dir)) $filename = basename($dir);
$this -> addFile($fileValue, $filename);
}else{
$this->dirTree($dir,$dir);
}

$zipfilenametemp = time().$zipfilename;
$out = $this -> filezip();
$fp = fopen($zipfilenametemp, w);
fwrite($fp, $out, strlen($out));
fclose($fp);
$filesize = filesize($zipfilenametemp);

if ($filesize < 104857600) {
if($autoDownload){
header(Content-type: application/octet-stream);
header(Content-disposition: attachment; filename=.$zipfilename);
}
echo $this -> filezip();
}else{
echo create zip error!;
}
unlink($zipfilenametemp);
}
}
//get dir tree..
function dirTree($directory,$rootDir){
global $_SERVER,$dirInfo,$rootDir;

$fileDir=$rootDir;
$myDir=dir($directory);
while($file=$myDir->read()){
if(is_dir($directory/$file) and $file!=. and $file!=..){
$dirInfo[0]++;
$rootDir =$fileDir$file/;

$this -> addFile(, $rootDir);

//go on ns folders
$this->dirTree($directory/$file,$rootDir);
}else{
if($file!=. and $file!=..){
$dirInfo[1]++;
//$fd = fopen ($directory/$file, r);
$fileValue = file_get_contents($directory/$file);
//fclose ($fd);
$this -> addFile($fileValue, $fileDir$file);
}
}
}
$myDir->close();
}
function unix2DosTime($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);
}
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 = \x50\x4b\x03\x04;
$fr .= \x14\x00; // ver needed to extract
$fr .= \x00\x00; // gen purpose bit flag
$fr .= \x08\x00; // 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 = \x50\x4b\x01\x02;
$cdrec .= \x00\x00; // version made by
$cdrec .= \x14\x00; // version needed to extract
$cdrec .= \x00\x00; // gen purpose bit flag
$cdrec .= \x08\x00; // 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;
}
function filezip(){
$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
\x00\x00; // .zip file comment length
}
}
?>

zip.php文件打包