_php instance of PHP code that compresses folders into zip files

Source: Internet
Author: User
Tags bit set crc32 create zip getdate pack php code time and date zip
1. Please download my prepared zip.php tool class, download and unzip, put the file in the corresponding directory, I was placed in the virtual directory under the Include folder.
2. Add the following code to your PHP file
Copy Code code as follows:

Require_once "./include/zip.php";
$zip = new Phpzip ();
$zip-> createzip ("folder directory address to compress", "compressed file name. zip"); Generate No automatic downloads only
$zip-> downloadzip ("folder directory address to compress", "compressed file name. zip"); Automatic download

Example: You can refer to the following pseudocode to see a specific use scenario:
Code
Copy Code code as follows:

Require_once "./include/zip.php";
if (! $download) {
Exit ();
}
Set_time_limit (60);
$tmpManager = new Tmpmanager (); Let's say we have a class to do the following.
$tempfolder = Array ();
$tempfile = Array ();
Suppose we download the selected folder or file by selecting a checkbox on the page and packing together
for ($i = 0; $i < $checkboxnum; $i + +) {
$value = ${"select". $i};
if ($value!= ') {
$this _type = substr ($value, 0, 1);
$this _id = substr ($value, 1);
Separate folder and file conditions
if ($this _type = = ' d ') {
$tempfolder [] = $this _id;
}
ElseIf ($this _type = = ' F ') {
$tempfile [] = $this _id;
}
}
}
@mkdir ($tempdir);
$curtempdir = "$tempdir/" $userid; Different users operate in different temporary folders
if (file_exists ($curtempdir)) {
$tmpManager->deletedir ($curtempdir); Delete old folders
}
if (sizeof ($tempfolder) > 0 | | sizeof ($TEMPFILE) > 0) {
mkdir ($curtempdir, 0777); If you have a file folder to package, recreate the folder
}
if (sizeof ($tempfile) > 0) {
$tmpManager->copyfile ($tempfile, $curtempdir); Copy the file you want to download to the folder you created
}
if (sizeof ($tempfolder) > 0) {
$tmpManager->copyfolder ($tempfolder, $curtempdir); Copy the folder you want to download to the folder you created
}
$zip = new Phpzip ();
$zip-> downloadzip ($curtempdir, "File_". Date (' Ymd '). Zip "); Package and download

zip.php
Copy Code code as follows:

<?php
/*
File Name:/include/zip.php
Author:horace 2009/04/15
*/
Class phpzip{
var $dirInfo = Array ("0", "0");
var $rootDir = ';
var $datasec = array ();
var $ctrl _dir = Array ();
var $eof _ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old _offset = 0;

function Downloadzip () {
Createzip ($dir, $zipfilename, true);
}
function Createzip ($dir, $zipfilename, $autoDownload = False) {
if (@function_exists (' gzcompress ')) {
@set_time_limit ("0");
if (Is_array ($dir)) {
$FD = fopen ($dir, "R");
$fileValue = Fread ($FD, FileSize ($filename));
Fclose ($FD);
if (Is_array ($dir)) $filename = basename ($dir);
$this-> AddFile ($fileValue, "$filename");
}else{
$this->dirtree ($dir, $dir);
}

$zipfilenametemp = Time (). $zipfilename;
$out = $this-> filezip ();
$fp = fopen ($zipfilenametemp, "w");
Fwrite ($fp, $out, strlen ($out));
Fclose ($FP);
$filesize = FileSize ($zipfilenametemp);

if ($filesize < 104857600) {
if ($autoDownload) {
Header ("Content-type:application/octet-stream");
Header ("content-disposition:attachment; Filename= ". $zipfilename);
}
echo $this-> filezip ();
}else{
echo "Create zip error!";
}
Unlink ($zipfilenametemp);
}
}
Get dir..
function DirTree ($directory, $rootDir) {
Global $_server, $dirInfo, $rootDir;

$fileDir = $rootDir;
$myDir =dir ($directory);
while ($file = $myDir->read ()) {
if (Is_dir ("$directory/$file") and $file!= "." and $file!= "...") {
$dirInfo [0]++;
$rootDir = "$fileDir $file/";

$this-> addfile (", $rootDir");

Go on n ' s folders
$this->dirtree ("$directory/$file", $rootDir);
}else{
if ($file!= "." and $file!= "...") {
$dirInfo [1]++;
$FD = fopen ("$directory/$file", "R");
$fileValue = file_get_contents ("$directory/$file");
Fclose ($FD);
$this-> AddFile ($fileValue, "$fileDir $file");
}
}
}
$myDir->close ();
}
function Unix2dostime ($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"; Ver needed to extract
$fr. = "\x00\x00"; Gen Purpose bit Flag
$fr. = "\x08\x00"; Compression method
$fr. = $hexdtime; Last mod time and date

"Local File Header" segment
$unc _len = strlen ($data);
$CRC = CRC32 ($data);
$zdata = gzcompress ($data);
$c _len = strlen ($zdata);
$zdata = substr (substr ($zdata, 0, strlen ($zdata)-4), 2); Fix CRC Bug
$fr. = Pack (' V ', $CRC); Crc32
$fr. = Pack (' V ', $c _len); Compressed FileSize
$fr. = Pack (' V ', $unc _len); Uncompressed FileSize
$fr. = Pack (' V ', strlen ($name)); Length of filename
$fr. = Pack (' V ', 0); Extra field length
$fr. = $name;

"File Data" segment
$fr. = $zdata;

"Data Descriptor" segment (optional but necessary if archive is not
served as file)
$fr. = Pack (' V ', $CRC); Crc32
$fr. = Pack (' V ', $c _len); Compressed FileSize
$fr. = Pack (' V ', $unc _len); Uncompressed FileSize

Add this entry to array
$this-> datasec[] = $FR;
$new _offset = strlen (Implode (', $this->datasec));

Now add to the "Now" directory record
$cdrec = "\x50\x4b\x01\x02";
$cdrec. = "\x00\x00"; Version made by
$cdrec. = "\x14\x00"; Version needed to extract
$cdrec. = "\x00\x00"; Gen Purpose bit Flag
$cdrec. = "\x08\x00"; Compression method
$cdrec. = $hexdtime; Last MoD time & date
$cdrec. = Pack (' V ', $CRC); Crc32
$cdrec. = Pack (' V ', $c _len); Compressed FileSize
$cdrec. = Pack (' V ', $unc _len); Uncompressed FileSize
$cdrec. = Pack (' V ', strlen ($name)); Length of filename
$cdrec. = Pack (' V ', 0); Extra field length
$cdrec. = Pack (' V ', 0); File Comment length
$cdrec. = Pack (' V ', 0); Disk number Start
$cdrec. = Pack (' V ', 0); Internal file attributes
$cdrec. = Pack (' V ', 32); External file attributes-' archive ' bit set

$cdrec. = Pack (' V ', $this-> old_offset); Relative offset of local header
$this-> old_offset = $new _offset;

$cdrec. = $name;

Optional extra field, file comment goes here
Save to the \ Directory
$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)). Total # of entries ' on this disk '
Pack (' V ', sizeof ($this-> ctrl_dir)). Total # of entries overall
Pack (' V ', strlen ($ctrldir)). Size of
Pack (' V ', strlen ($data)). Offset to start of the
"\x00\x00"; . zip file Comment length
}
}
?>

zip.php File Packaging

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