PHP在线解压缩ZIP压缩文件的代码

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; $i<$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 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’];

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 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 < 277) $maximum_size = $size; else $maximum_size=277; @fseek($zip, $size-$maximum_size); $pos = ftell($zip); $bytes = 0x00000000; while ($pos < $size){ $byte = @fread($zip, 1); $bytes=($bytes << 8) | ord($byte); if ($bytes == 0x504b0506 or $bytes == 0x2e706870504b0506){ $pos++;break;} $pos++; } $fdata=fread($zip,18); $data=@unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',$fdata); if ($data['comment_size'] != 0) $centd['comment'] = fread($zip, $data['comment_size']); else $centd['comment'] = ''; $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 $centd; } function ExtractFile($header,$to,$zip){ $header = $this->readfileheader($zip);

if(substr($to,-1)!=”/”) $to.=”/”;
if($to==’./’) $to = ”;
$pth = explode(“/”,$to.$header[‘filename’]);
$mydir = ”;
for($i=0;$itotal_folders==0)) && is_dir($mydir)) ){
@chmod($mydir,0777);
$this->total_folders ++;
echo “ 目录: $mydir
“;
}
}

if(strrchr($header[‘filename’],’/’)==’/’) return;

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.$header['filename'].'.gz','rb') or die("Cette archive est compress閑"); if(!$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'); } } $this->total_files ++;
echo “ 文件: $to$header[filename]
“;

return true;
}

// end class
}

set_time_limit(0);

if ($_POST[‘password’] != $password) die(“输入的密码不正确，请重新输入。”);
if(!$_POST[“todir”]) $_POST[“todir”] = “.”;
$z = new Zip;
$have_zip_file = 0;
function start_unzip($tmp_name,$new_name,$checked){
global $_POST,$z,$have_zip_file;
$upfile = array(“tmp_name”=>$tmp_name,”name”=>$new_name);
if(is_file($upfile[tmp_name])){
$have_zip_file = 1;
echo “
正在解压: $upfile[name]

“;
if(preg_match(‘/\.zip$/mis’,$upfile[name])){
$result=$z->Extract($upfile[tmp_name],$_POST[“todir”]);
if($result==-1){
echo “
文件 $upfile[name] 错误.
“;
}
echo “
完成,共建立 $z->total_folders 个目录,$z->total_files 个文件.

“;
}else{
echo “
$upfile[name] 不是 zip 文件.

“;
}
if(realpath($upfile[name])!=realpath($upfile[tmp_name])){
@unlink($upfile[name]);
rename($upfile[tmp_name],$upfile[name]);
}
}
}
clearstatcache();

start_unzip($_POST[“zipfile”],$_POST[“zipfile”],0);
start_unzip($_FILES[“upfile”][tmp_name],$_FILES[“upfile”][name],1);

if(!$have_zip_file){
echo “
请选择或上传文件.
“;
}
?>

=0;$i--){
if(is_file($dfile[$i])){
if(@unlink($dfile[$i])){
echo "已删除文件: $dfile[$i]
";
}else{
echo "删除文件失败: $dfile[$i]
";
}
}else{
if(@rmdir($dfile[$i])){
echo "已删除目录: $dfile[$i]
";
}else{
echo "删除目录失败: $dfile[$i]
";
}
}

}
}
echo "
完成.

";

endif;

?>