PHP 压缩文件夹的类代码

　　复制代码 代码如下:
<?php
/*
$Id: PHPZip.php
*/
class PHPZip {
var $datasec = array();
var $ctrl_dir = array();
var $eof_ctrl_dir = \x50\x4b\x05\x06\x00\x00\x00\x00;
var $old_offset = 0;
function Zip($dir, $zipfilename) {
if (@function_exists(gzcompress)) {
@set_time_limit(0);
$this->openFile($dir,$dir);
$out = $this -> filezip();
$fp = fopen($zipfilename, w);
fwrite($fp, $out, strlen($out));
fclose($fp);
}
}
function openFile($path, $zipName) {
$temp_path = $path;
$temp_zip_path = $zipName;
$zipDir = $zipName;
if ($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, $zipName . / . $file);
} else {
$this ->openFile($path./.$file, $zipName . / . $file);
}
}
}
$zipName = $temp_zip_path;
$path = $temp_path;
closedir($handle);
}
}
function unix2DosTime($unixtime = 0) {
$timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
if ($timearray[year] < 1980) {
$timearray[year] = 1980;
$timearray[mon] = 1;
$timearray[mday] = 1;
$timearray[hours] = 0;
$timearray[minutes] = 0;
$timearray[seconds] = 0;
}
return (($timearray[year] - 1980) << 25) ($timearray[mon] << 21) ($timearray[mday] << 16)
($timearray[hours] << 11) ($timearray[minutes] << 5) ($timearray[seconds] >> 1);
}
function addFile($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 = \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;
}
}
?>