说明：
做WEB时用FTP上传零碎的文件会比较费时间，但上传打包后的单个文件会很快，在上传之后可以使用此程序将zip文件解压。代码参考了纯粹空间的“faisun_unzip -在线解压ZIP文件程序 V1.0”，略有修改。
用法：
第一步：制作zip.php文件。
<?php
include('zip.class.php');
if (empty($_GET['f'])){
echo 'Usage: ?f=file.zip&d=directory';
}else{
$file = $_GET['f'];
$directory = $_GET['d']; // zip.class.php会处理这块数据
if(preg_match('/\.zip$/mis',$file)){
$z = new zip();
$result=$z->extract($file,$directory);
if($result==-1){
echo "<br>File: [$file] error.";
}
echo "<br>Done. Folders: $z->totalFolders , Files: $z->totalFiles .";
}else{
echo "<br>Wrong file format.";
}
}
?>
第二步：上传后解压。
http://domain/zip.php?f=archive.zip&d=web #参数“f”是上传的包，“d”是解压到的目录（同级目录）。
下载：
代码：
<?php
class zip {
public $totalFiles = 0;
public $totalFolders = 0;
function extract ($zn, $to = './', $index = Array(-1)) {
$ok = 0;
$zip = @fopen($zn, 'rb');
if(!$zip) return(-1);
$cdir = $this->readCentralDir($zip, $zn);
$posEntry = $cdir['offset'];
if(!is_array($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, $posEntry);
$header = $this->readCentralFileHeaders($zip);
$header['index'] = $i;
$posEntry = ftell($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) {
$binaryData = fread($zip, 30);
$data = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binaryData);
$header['filename'] = fread($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){
$binaryData = fread($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', $binaryData);
if ($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);
# 创建目录
if (!file_exists($to)){
@mkdir($to);
}else if(file_exists($to) && !is_dir($to)){
@rename($to, $to . '_bak_by_zip');
@mkdir($to);
}
if(substr($to, -1) != "/") $to .= "/";
if($to == './') $to = '';
$pth = explode("/", $to . $header['filename']);
$mydir = '';
for($i = 0;$i < count($pth)-1;$i++){
if(!$pth[$i]) continue;
$mydir .= $pth[$i] . "/";
if((!is_dir($mydir) && @mkdir($mydir, 0777)) || (($mydir == $to . $header['filename'] || ($mydir == $to && $this->totalFolders == 0)) && is_dir($mydir))){
@chmod($mydir, 0777);
$this->totalFolders ++;
echo "[d] <a href='$mydir' target='_blank'>$mydir</a><br>";
}
}
if(strrchr($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){
$readSize = ($size < 2048 ? $size : 2048);
$buffer = fread($zip, $readSize);
$binaryData = pack('a' . $readSize, $buffer);
@fwrite($fp, $binaryData, $readSize);
$size -= $readSize;
}
fclose($fp);
touch($to . $header['filename'], $header['mtime']);
}else{
$fp = @fopen($to . $header['filename'] . '.gz', 'wb');
if(!$fp) return(-1);
$binaryData = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']),
Chr(0x00), time(), Chr(0x00), Chr(3));
fwrite($fp, $binaryData, 10);
$size = $header['compressed_size'];
while ($size != 0){
$readSize = ($size < 1024 ? $size : 1024);
$buffer = fread($zip, $readSize);
$binaryData = pack('a' . $readSize, $buffer);
@fwrite($fp, $binaryData, $readSize);
$size -= $readSize;
}
$binaryData = pack('VV', $header['crc'], $header['size']);
fwrite($fp, $binaryData, 8);
fclose($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){
$readSize = ($size < 2048 ? $size : 2048);
$buffer = gzread($gzp, $readSize);
$binaryData = pack('a' . $readSize, $buffer);
@fwrite($fp, $binaryData, $readSize);
$size -= $readSize;
}
fclose($fp);
gzclose($gzp);
touch($to . $header['filename'], $header['mtime']);
@unlink($to . $header['filename'] . '.gz');
}
}
$this->totalFiles ++;
echo "[-] <a href='$to$header[filename]' target='_blank'>$to$header[filename]</a><br>";
return true;
}
}
?>
＜完＞
