帝国CMS二次开发实现压缩与解压缩功能使用教程

在帝国cms系统文件中,e/class/phpzip.inc.php是专门处理文件压缩功能的，阅读代码你会发现，它没有解压缩功能。

网站有个模板版块提供各种网页模板、手机模板下载功能。系统除了录入模板的介绍信息外，还需要上传模板截图，模板附件等。可是有些模板页面实在太多了，不能一一截图展示，再说如果截图过多，1是费力，2是费网络资源，3是用户体验也不好。所以就必须要有一些解压文件包的功能，把上传的附件解压到某个指定目录，形成内部静态网页，让用户可以预览模板，切实体验模板详情。

功能代码制作

查了一下相关资料，发现写个php解压缩文件功能还是比较复杂的，所以就从网上找到别人写好的代码，融合到帝国CMS里，大家可以把以下代码复制到e/class/phpzip.inc.php文件第213行下：

//解压文件部分
function unZip($zipfile, $to, $index = Array(-1)) {
$ok  = 0;
$zip = @fopen($zipfile, 'rb');
if(!$zip){ return(-1); }
$cdir      = $this->ReadCentralDir($zip, $zipfile);
$pos_entry = $cdir['offset'];
if(!is_array($index)){ $index = array($index); }
for($i=0; $index[$i]; $i++)
{
if(intval($index[$i]) != $index[$i] || $index[$i] > $cdir['entries'])
{
return(-1);
}
}
for($i=0; $i<$cdir['entries']; $i++)
{
@fseek($zip, $pos_entry);
$header          = $this->ReadCentralFileHeaders($zip);
$header['index'] = $i;
$pos_entry       = ftell($zip);
@rewind($zip);
fseek($zip, $header['offset']);
if(in_array("-1", $index) || in_array($i, $index))
{
$stat[$header['filename']] = $this->ExtractFile($header, $to, $zip);
}
}
fclose($zip);
return $stat;
}
function ReadCentralDir($zip, $zipfile) {
$size     = filesize($zipfile);
$max_size = ($size < 277) ? $size : 277;
@fseek($zip, $size - $max_size);
$pos   = ftell($zip);
$bytes = 0x00000000;
while($pos < $size)
{
$byte  = @fread($zip, 1);
$bytes = ($bytes << 8) | Ord($byte);
$pos++;
if($bytes == 0x504b0506){ break; }
}
$data = unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size', fread($zip, 18));
$centd['comment']      = ($data['comment_size'] != 0) ? fread($zip, $data['comment_size']) : '';  // 注释
$centd['entries']      = $data['entries'];
$centd['disk_entries'] = $data['disk_entries'];
$centd['offset']       = $data['offset'];
$centd['disk_start']   = $data['disk_start'];
$centd['size']         = $data['size'];
$centd['disk']         = $data['disk'];
return $centd;
}
function ReadCentralFileHeaders($zip) {
$binary_data = fread($zip, 46);
$header      = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);
$header['filename'] = ($header['filename_len'] != 0) ? fread($zip, $header['filename_len']) : '';
$header['extra']    = ($header['extra_len']    != 0) ? fread($zip, $header['extra_len'])    : '';
$header['comment']  = ($header['comment_len']  != 0) ? fread($zip, $header['comment_len'])  : '';
if($header['mdate'] && $header['mtime'])
{
$hour    = ($header['mtime']  & 0xF800) >> 11;
$minute  = ($header['mtime']  & 0x07E0) >> 5;
$seconde = ($header['mtime']  & 0x001F) * 2;
$year    = (($header['mdate'] & 0xFE00) >> 9) + 1980;
$month   = ($header['mdate']  & 0x01E0) >> 5;
$day     = $header['mdate']   & 0x001F;
$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
} else {
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['status'] = 'ok';
if(substr($header['filename'], -1) == '/'){ $header['external'] = 0x41FF0010; }  // 判断是否文件夹
return $header;
}
function ExtractFile($header, $to, $zip) {
$header = $this->readfileheader($zip);
$pthss = "";
if(substr($to, -1) != "/"){ $to .= "/"; }
if(!@is_dir($to)){ @mkdir($to, 0777); }
$pth = explode("/", dirname($header['filename']));
for($i=0; isset($pth[$i]); $i++){
if(!$pth[$i]){ continue; }
$pthss .= $pth[$i]."/";
if(!is_dir($to.$pthss)){ @mkdir($to.$pthss, 0777); }
}
if(!($header['external'] == 0x41FF0010) && !($header['external'] == 16))
{
if($header['compression'] == 0)
{
$fp = @fopen($to.$header['filename'], 'wb');
if(!$fp){ return(-1); }
$size = $header['compressed_size'];
while($size != 0)
{
$read_size   = ($size < 2048 ? $size : 2048);
$buffer      = fread($zip, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size       -= $read_size;
}
fclose($fp);
touch($to.$header['filename'], $header['mtime']);
}else{
$fp = @fopen($to.$header['filename'].'.gz', 'wb');
if(!$fp){ return(-1); }
$binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']), Chr(0x00), time(), Chr(0x00), Chr(3));
fwrite($fp, $binary_data, 10);
$size = $header['compressed_size'];
while($size != 0)
{
$read_size   = ($size < 1024 ? $size : 1024);
$buffer      = fread($zip, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size       -= $read_size;
}
$binary_data = pack('VV', $header['crc'], $header['size']);
fwrite($fp, $binary_data, 8);
fclose($fp);
$gzp = @gzopen($to.$header['filename'].'.gz', 'rb') or die("Cette archive est compress!");
if(!$gzp){ return(-2); }
$fp = @fopen($to.$header['filename'], 'wb');
if(!$fp){ return(-1); }
$size = $header['size'];
while($size != 0)
{
$read_size   = ($size < 2048 ? $size : 2048);
$buffer      = gzread($gzp, $read_size);
$binary_data = pack('a'.$read_size, $buffer);
@fwrite($fp, $binary_data, $read_size);
$size       -= $read_size;
}
fclose($fp); gzclose($gzp);
touch($to.$header['filename'], $header['mtime']);
@unlink($to.$header['filename'].'.gz');
}
}
return true;
}
function ReadFileHeader($zip) {
$binary_data = fread($zip, 30);
$data        = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);
$header['filename']        = fread($zip, $data['filename_len']);
$header['extra']           = ($data['extra_len'] != 0) ? fread($zip, $data['extra_len']) : '';
$header['compression']     = $data['compression'];
$header['size']            = $data['size'];
$header['compressed_size'] = $data['compressed_size'];
$header['crc']             = $data['crc'];
$header['flag']            = $data['flag'];
$header['mdate']           = $data['mdate'];
$header['mtime']           = $data['mtime'];
if($header['mdate'] && $header['mtime']){
$hour    = ($header['mtime']  & 0xF800) >> 11;
$minute  = ($header['mtime']  & 0x07E0) >> 5;
$seconde = ($header['mtime']  & 0x001F) * 2;
$year    = (($header['mdate'] & 0xFE00) >> 9) + 1980;
$month   = ($header['mdate']  & 0x01E0) >> 5;
$day     = $header['mdate']   & 0x001F;
$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
}else{
$header['mtime'] = time();
}
$header['stored_filename'] = $header['filename'];
$header['status']          = "ok";
return $header;
}
function GetOneFileName($zipfile){
$zip = @fopen($zipfile, 'rb');
$v=$this->ReadFileHeader($zip);
if(substr($v['filename'], -1) == '/') {
return $v['filename'];
}else{
return '';
}
}

如何使用解压缩功能

在完成上一步代码复制粘贴后，在你要使用的页面中引入：

require ECMS_PATH.'e/class/phpzip.inc.php';
$z=new PHPZip(); //新建立一个zip的类
$res=$z->unZip('你要解压的文件','解压到那个文件夹下'); //两个地址一定要是绝对目录
/*
*  举例
*  $res=$z->unZip(ECMS_PATH.'https://www.hhymw.com/d/file/mb/qianduanmb/20190426/abc.rar',ECMS_PATH.'/demo/html/abc');
*/

在实际的使用中，要解压附件并不是上面几行代码就能完成的，下面说是对此问题的解压思路及代码上的实现

1、获取真实地址。想要得到某条信息附件的真实地址，我们需要拿到信息的ID,通过步骤查询，然后解析获取。

2、定义想要解压到目录的规则

3、创建目录（如果有就跳过，没有就新创建）

4、判断压缩包里第一层是文件还是文件夹

5、执行解压缩

6、更新数据

代码：

$z=new PHPZip(); //新建立一个zip的类
$r=$empire->fetch1("select downpath from {$dbtbpre}ecms_download_data_1 WHERE id=$id limit 1"); //查询附件
$path_r=explode("rn",$r[downpath]); //解析下载地址
$showdown_r=explode("::::::",$path_r[0]);//拆分第一行下载地址
$downurl=$showdown_r[1];//将第一行下载地址赋值给$downurl变量
if($downurl) { //如果存在下载地址
$zipfile=ECMS_PATH.$downurl; //组合服务器绝对附件地址，如: D:wwwrootwwwhttps://www.wdzzz.com/d/file/mb/qianduanmb/20190426/abc.rar
$tofile=ECMS_PATH.'/demo/'.$id.'/'; //定义想要解压到目录的规则
if(!is_dir($tofile)) { //创建目录
@mkdir($tofile,0777,ture);
@chmod($tofile,0777);
}
$mulu=$z->GetOneFileName($zipfile);//判断压缩包里第一层是文件还是文件夹
$mulu = iconv('gbk','utf-8',$mulu);//将中文目录转码
$res=$z->unZip($zipfile,$tofile);//执行解压缩操作
if($res) {
$ysurl='/demo/'.$id.'/'.$mulu;
$empire->query("update {$dbtbpre}ecms_download set ysurl='$ysurl' WHERE id=$id");//更新数据
return json_encode(array('error'=>0,'ysurl'=>$ysurl,'msg'=>'生成演示目录成功'));
}
}

以上是解压缩的核心代码，想要集成到信息里可以把代码封装成函数，以便后期调用。如果不会的话，可以联系本站站长做付费操作。下面说说帝国CMS的压缩功能

帝国CMS压缩文件夹功能：

require ECMS_PATH.'e/class/phpzip.inc.php'; //引入类文件
$z=new PHPZip(); //新建立一个zip的类
$z->Zip('要压缩的文件夹','压缩到那个文件夹下');
//举例: $z->Zip('D:wampwwwdgcmsaa','D:wampwwwdgcmsbbaa.zip'); //添加指定目录