php压缩文件zip的例子
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
用法：
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
$zip -> downloadzip(要压缩的文件夹目录地址, 压缩后的文件名.zip); //自动下载
实例：可以参考下面的伪代码来看一个具体的使用场景： 代码
require_once ./include/zip.php;
if (!$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 $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
压缩类:
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 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] $timearray[year] = 1980; $timearray[mon] = 1; $timearray[mday] = 1; $timearray[hours] = 0; $timearray[minutes] = 0; $timearray[seconds] = 0;} // end ifreturn (($timearray[year] - 1980) ($timearray[hours] > 1);}function addfile($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 = 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
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