进行数据下载的过程中,有大量的文件预先生成,然后,需要对这个文件进行压缩下载,不知道哪个高人有高见?指点一二?
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//$dl为文件列表数组
$dfiles="";
foreach ($dl AS $filepath) {
$dfiles.=$filepath.",";
}
$dfiles=substr($dfiles,0,strlen($dfiles)-1);
$dl=explode(",",$dfiles);
$zip=new PHPZip($dl);
$code=$zip->out;
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length: ".strlen($code));
header("Content-Disposition: attachment;filename=".$_SERVER['HTTP_HOST']."_Files.tar.gz");
echo $code;
exit;//--------------------------
// 压缩打包类
class PHPZip{
var $out='';
function PHPZip($dir) {
if (@function_exists('gzcompress')) {
$curdir = getcwd();
if (is_array($dir)) $filelist = $dir;
else{
$filelist=$this -> GetFileList($dir);//文件列表
foreach($filelist as $k=>$v) $filelist[]=substr($v,strlen($dir)+1);
}
if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);
else chdir($curdir);
if (count($filelist)>0){
foreach($filelist as $filename){
if (is_file($filename)){
$fd = fopen ($filename, "r");
$content = @fread ($fd, filesize ($filename));
fclose ($fd);
if (is_array($dir)) $filename = basename($filename);
$this -> addFile($content, $filename);
}
}
$this->out = $this -> file();
chdir($curdir);
}
return 1;
}
else return 0;
} // 获得指定目录文件列表
function GetFileList($dir){
static $a;
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
if($file!='.' && $file!='..'){
$f=$dir .'/'. $file;
if(is_dir($f)) $this->GetFileList($f);
$a[]=$f;
}
}
closedir($dh);
}
}
return $a;
} var $datasec = array();
var $ctrl_dir = array();
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old_offset = 0; function unix2DosTime($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;
$timearray['seconds'] = 0;
} // end if
return (($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 file() {
$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";
}
}