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小弟我有这么一个压缩文件夹的类,求更快的压缩方法

时间:2021-07-01 10:21:17 帮助过:14人阅读

我有这么一个压缩文件夹的类,求更快的压缩方法


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");
$fwrite = fwrite($fp, $out, strlen($out));
fclose($fp);
if($fwrite == true)
{
return true;
}
}
return false;
}

function openFile($path, $zipName)
{
$temp_path = $path;
$temp_zip_path = $zipName;
$zipDir = $zipName;

if($handle = @opendir($path))
{
while(($file = readdir($handle))!==false)
{
$sub_dir = $path . DIRECTORY_SEPARATOR . $file; //构建子目录路径
if($file == '.' || $file == '..') {
continue;
}else if(is_dir($sub_dir)) { //如果是目录,进行递归
$this->openFile($path . '/' . $file, $zipName . '/' . $file);
}
else{
$fd = fopen($path . '/' . $file, "r");
$fileValue = @fread($fd, 1024000);
if($fd)
fclose($fd);
$this->addFile($fileValue, $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";
}

}

//我有个文件夹,大概30M,600个文件,打包时间超过半个小时候以上,谁有更好更快的打包方法啊,不胜感谢了。


------解决方案--------------------
php 提供有 zip 扩展,为什么不用?

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