PHP打包下载整个文件夹或多文件

有时候需要输出服务器上某个文件夹的全部文件，比如备份网站，用下面的PHP函数来实现。

函数库代码PHPZip为：(请复制以下代码保存，以供调用）
[php]
Class PHPZip{ Private $StrPath="../../@UpLoad"; Private $datasec=array(); Private $ctrl_dir=array(); Private $eof_ctrl_dir="\x50\x4b\x05\x06\x00\x00\x00\x00"; Private $old_offset=0; //压缩后下载 Function DownLoad($curdir,$zipfilename,$out){ $zipfilename=StrToLower($zipfilename); $curdir=Str_iReplace(basename($curdir),"",$curdir); chdir($curdir.$this->StrPath);

header(‘Content-Encoding: none’);
header(‘Content-Type: application/zip’);
header(‘Content-Disposition: attachment ; filename=’.Str_Replace(“.zip”,””,basename($zipfilename)).’.zip’);
header(‘Pragma: no-cache’);
header(‘Expires: 0’);
print($out);
}

//压缩后保存在服务器,默认在/@Upload下
Function SaveFile($curdir,$zipfilename,$out){
$curdir=Str_iReplace(basename($curdir),””,$curdir);
chdir($curdir.$this->StrPath);
$fp=fopen($zipfilename,”wb”);
fwrite($fp,$out,strlen($out));
fclose($fp);
}

//函数用途:压缩文件夹,递归逐层进行
//参数详解:$dir需要压缩的目录,$zipfilename压缩后的文件名及存放路径,$Todo处理方式1提供下载2保存文件在服务器
Function ZipDir($dir,$zipfilename,$Todo){
IF(!@Function_exists(‘gzcompress’)){Return 0;}
@set_time_limit(“0”);
$this->openFile($dir,$zipfilename);
$out=$this -> filezip();

Switch ($Todo){
Case “1”:
$this -> DownLoad(__FILE__,$zipfilename,$out);
Break;
Case “2”:
$this -> SaveFile(__FILE__,$zipfilename,$out);
Break;
}
}

//函数用途:压缩文件,可以是单个也可以是数组的多个
//参数详解:$file需要压缩的文件(可为数组),$zipfilename压缩后的文件名及存放路径,$Todo处理方式1提供下载2保存文件在服务器
Function ZipFile($file,$zipfilename,$Todo){
IF(!@Function_exists(‘gzcompress’)){Return 0;}
IF(is_array($file)){
Foreach($file as $filename){
IF(is_file($filename)){
$fd= fopen ($filename, “rb”);
$content= @fread($fd, filesize ($filename));
fclose ($fd);

$filename= basename($filename);
$this -> addFile($content, $filename);
}
}
}Else{
IF(is_file($file)){
$fd= fopen ($file, “rb”);
$content= @fread($fd, filesize($file));
fclose ($fd);
$file= basename($file);
$this -> addFile($content, $file);
}
}
$out= $this -> filezip();

Switch ($Todo){
Case “1”:
$this -> DownLoad(__FILE__,$zipfilename,$out);
Break;
Case “2”:
$this -> SaveFile(__FILE__,$zipfilename,$out);
Break;
}
}

//递归取得下层文件夹下的文件
Function openFile($path,$zipName){
$temp_path=$path;
$temp_zip_path=$zipName;
IF($handle=@opendir($path)){
While(false !== ($file=readdir($handle))){
IF($file !=’.’ and $file !=’..’){
IF(ereg(‘\.’ ,$file.@basename())){
$fd=fopen($path.’/’.$file,”r”);
$fileValue=@fread($fd,1024000);
fclose ($fd);
$this -> addFile($fileValue,$path.’/’.$file);
}Else{
$this ->openFile($path.’/’.$file,$zipName.’/’.$file);
}
}
}
$zipName=$temp_zip_path;
$path=$temp_path;
closedir($handle);
}
}

Function addFile($data,$name,$time=0){
$name=str_replace(‘\\’,’/’,$name);
$name=str_replace(‘./’,”,str_replace(‘../’,”,$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″;
$fr.=”\x00\x00″;
$fr.=”\x08\x00″;
$fr.=$hexdtime;

$unc_len=strlen($data);
$crc=crc32($data);
$zdata=gzcompress($data);
$c_len=strlen($zdata);
$zdata=substr(substr($zdata,0,strlen($zdata) – 4),2);
$fr.=pack(‘V’,$crc);
$fr.=pack(‘V’,$c_len);
$fr.=pack(‘V’,$unc_len);
$fr.=pack(‘v’,strlen($name));
$fr.=pack(‘v’,0);
$fr.=$name;
$fr.=$zdata;
$fr.=pack(‘V’,$crc);
$fr.=pack(‘V’,$c_len);
$fr.=pack(‘V’,$unc_len);

$this -> datasec[]=$fr;
$new_offset=strlen(implode(”,$this->datasec));

$cdrec=”\x50\x4b\x01\x02″;
$cdrec.=”\x00\x00″;
$cdrec.=”\x14\x00″;
$cdrec.=”\x00\x00″;
$cdrec.=”\x08\x00″;
$cdrec.=$hexdtime;
$cdrec.=pack(‘V’,$crc);
$cdrec.=pack(‘V’,$c_len);
$cdrec.=pack(‘V’,$unc_len);
$cdrec.=pack(‘v’,strlen($name) );
$cdrec.=pack(‘v’,0 );
$cdrec.=pack(‘v’,0 );
$cdrec.=pack(‘v’,0 );
$cdrec.=pack(‘v’,0 );
$cdrec.=pack(‘V’,32 );
$cdrec.=pack(‘V’,$this -> old_offset );
$this -> old_offset=$new_offset;
$cdrec.=$name;
$this -> ctrl_dir[]=$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)) .
pack(‘v’,sizeof($this -> ctrl_dir)) .
pack(‘V’,strlen($ctrldir)) .
pack(‘V’,strlen($data)).”\x00\x00″;
}

Function unix2DosTime($unixtime=0){
$timearray=($unixtime== 0) ? getdate() : getdate($unixtime);
IF($timearray[‘year’] > 1);
}

/*
解压缩部分
用途:解压缩文件
参数:$zn需要解压缩的zip文件及路径,$to解压缩的目的地
*/
Function Unzip_File($zn, $to, $index = Array(-1)){
$ok = 0;
$zip = @fopen($zn, ‘rb’);
IF(!$zip){Return(-1);}
$cdir = $this -> ReadCentralDir($zip, $zn);
$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 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;
}

//取得压缩包内的文件信息
Function get_List($zip_name){
$zip = @fopen($zip_name, ‘rb’);
IF(!$zip){Return(0);}
$centd = $this -> ReadCentralDir($zip, $zip_name);

@rewind($zip);
@fseek($zip, $centd[‘offset’]);

For($i=0;$i ReadCentralFileHeaders($zip);
$header[‘index’] = $i;
$info[‘filename’] = $header[‘filename’];
$info[‘stored_filename’] = $header[‘stored_filename’];
$info[‘size’] = $header[‘size’];
$info[‘compressed_size’] = $header[‘compressed_size’];
$info[‘crc’] = strtoupper(dechex($header[‘crc’]));
$info[‘mtime’] = $header[‘mtime’];
$info[‘comment’] = $header[‘comment’];
$info[‘folder’] = ($header[‘external’] == 0x41FF0010 || $header[‘external’] == 16)?1:0;
$info[‘index’] = $header[‘index’];
$info[‘status’] = $header[‘status’];
$ret[] = $info;
unset($header);
}
Return $ret;
}

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, $data[‘filename_len’]);
IF($data[‘extra_len’] != 0){$header[‘extra’] = fread($zip, $data[‘extra_len’]);}Else{$header[‘extra’] = ”;}

$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’];

$header[‘stored_filename’] = $header[‘filename’];
$header[‘status’] = “ok”;
Return $header;
}

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);

IF($header[‘filename_len’] != 0)
$header[‘filename’] = fread($zip, $header[‘filename_len’]);
Else $header[‘filename’] = ”;

IF($header[‘extra_len’] != 0)
$header[‘extra’] = fread($zip, $header[‘extra_len’]);
Else $header[‘extra’] = ”;

IF($header[‘comment_len’] != 0)
$header[‘comment’] = fread($zip, $header[‘comment_len’]);
Else $header[‘comment’] = ”;

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;
Return $header;
}

Function ReadCentralDir($zip, $zip_name){
$size = filesize($zip_name);
IF($size readfileheader($zip);

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
[/php]
使用方法：

函数:文件压缩
压缩参数:需要压缩的文件或文件夹(文件可为数组),压缩后的zip文件名及存放路径,压缩类型1:文件夹2:文件,后续操作1:压缩后下载;2:存放在服务器上(默认为/@Upload下)
压缩文件夹示例:Tozip(“./”,”../”.date(“d-H-i-s”).”.zip”,1,2);
压缩文件示例:
$aaa=array(“../1.txt”,”../2.txt”);
Tozip($aaa,”../2.zip”,2);

用法举例：
比如有这样一段文件结构：
home
–upload
—-1.jpg
—-2.jpg
—-3.jpg
–web
—-html
——inc
——–zip.php(这是上面的代码库）
——download.php

使用download.php中的代码，实现upload文件夹打包并自动下载：
[php]
ZipDir($Path,$ZipFile,$Todo);
Break;
Case “2”:
$zip->ZipFile($Path,$ZipFile,$Todo);
Break;
}

IF($Todo==1){
Die();
}Else{
Return True;
}
}

Tozip(“././upload”, “../../upload.zip”,1,1)
?>
[/php]

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