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php实现文件在线压缩功能_PHP教程

时间:2021-07-01 10:21:17 帮助过:7人阅读



class ZipAllFloder
{
var
$cachelist
= array();
var
$datasec
= array();
var
$ctrl_dir
= array();
var
$eof_ctrl_dir = "x50x4bx05x06x00x00x00x00"
;
var
$old_offset = 0
;

function
StartWork($dir
){
$result = $this->GetList($dir
);
$this->ClearCache
();
return
$result
;
}
function
ReadAndExport($filelist,$zipfilename
){
if (
count($filelist)>0
){
foreach(
$filelist as $filename
){
if (
is_file($filename
)){
$fp = fopen ($filename, "r"
);
$content = @fread ($fp,filesize($filename
));
fclose ($fp
);
$filename = basename($filename
);
$this -> addFile($content, $filename
);
}
}
}else{
$this -> addFile("This folder have none a single file!","nofile.log"
);
}
$out = $this -> outfile
();
$this -> IniVars
();
$fp = fopen($zipfilename,"w"
);
fwrite($fp,$out,strlen($out
));
fclose($fp
);
$this -> cachelist[] = $zipfilename
;
}
function
GetList($dir
){
if (
file_exists($dir
)){
$handle = opendir($dir
);
while(
$files = readdir($handle
)){
if ((
$files==".")||($files==".."
)) continue;
if(
is_dir($dir."/".$files
)){
$this -> GetList($dir."/".$files
);
}else{
$filelist[] = $dir."/".$files
;
}
}
closedir($handle
);
$zipfilename = dirname($dir)."/[FOLDER]".basename($dir).".zip"
;
$this -> ReadAndExport($filelist,$zipfilename
);
}
return
$zipfilename
;
}
function
ClearCache
(){
if(
$num = count($this ->cachelist
)){
for(
$i=0;$i<$num-1;$i
++){
@
unlink($this ->cachelist[$i
]);
}
}
}
function
IniVars
(){
$this -> datasec
= array();
$this -> ctrl_dir
= array();
$this -> eof_ctrl_dir = "x50x4bx05x06x00x00x00x00"
;
$this -> old_offset = 0
;
}
function
unix2DosTime($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
;
}
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 = "x50x4bx03x04"
;
$fr .= "x14x00"
;
$fr .= "x00x00"
;
$fr .= "x08x00"
;
$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 = "x50x4bx01x02"
;
$cdrec .= "x00x00"
;
$cdrec .= "x14x00"
;
$cdrec .= "x00x00"
;
$cdrec .= "x08x00"
;
$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
outfile
(){
$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
)) .
"x00x00"
;
}
}

$zip = new ZipAllFloder
();
$str = $zip->StartWork("./baby"
);
echo
$str
;
?>


www.bkjia.comtruehttp://www.bkjia.com/PHPjc/445086.htmlTechArticle?php class ZipAllFloder { var $cachelist =array(); var $datasec =array(); var $ctrl_dir =array(); var $eof_ctrl_dir = x50x4bx05x06x00x00x00x00 ; var $old_offset = 0 ; function Star...

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