ZIPing up some files on the client's PC.

[cbh]

Help,

I want to write some PHP so a user can upload some ZIPped files to a web server.

 

I know how to do the upload bit, but how do I execute a command on the client's PC to zip the files up before uploading them? (Maybe the question I'm really askking is how do I execute a command on the client's computer).

 

The clients (there's only 2 of them) computer is a Windows XP.

 

tia

 

cbHead

[fert]

you can't do that, but you can zip the files when they get to the server

[magic2goodil]

I found this for you, I had to fix it some, but I believe it should work:

 

<?php



// Class definition found at http://www.zend.com/zend/spotlight/creating-zip-files3.php
// Some alterations to the original posted code were made in order to get everything working properly
// See example usage at the bottom of this page

class zipfile
{
var $datasec = array();
var $ctrl_dir = array();
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
var $old_offset = 0;

function add_dir($name) {
$name = str_replace("", "/", $name);

$fr = "\x50\x4b\x03\x04";
$fr .= "\x0a\x00";
$fr .= "\x00\x00";
$fr .= "\x00\x00";
$fr .= "\x00\x00\x00\x00";

$fr .= pack("V",0);
$fr .= pack("V",0);
$fr .= pack("V",0);
$fr .= pack("v", strlen($name));
$fr .= pack("v", 0 );
$fr .= $name;
$fr .= pack("V", 0);
$fr .= pack("V", 0);
$fr .= pack("V", 0);

$this->datasec[] = $fr;
$new_offset = strlen(implode("", $this->datasec));

$cdrec = "\x50\x4b\x01\x02";
$cdrec .="\x00\x00";
$cdrec .="\x0a\x00";
$cdrec .="\x00\x00";
$cdrec .="\x00\x00";
$cdrec .="\x00\x00\x00\x00";
$cdrec .= pack("V",0);
$cdrec .= pack("V",0);
$cdrec .= pack("V",0);
$cdrec .= pack("v",strlen($name));
$cdrec .= pack("v",0);
$cdrec .= pack("v",0);
$cdrec .= pack("v",0);
$cdrec .= pack("v",0);
$ext = "\x00\x00\x10\x00";
$ext = "\xff\xff\xff\xff";
$cdrec .= pack("V",16);
$cdrec .= pack("V", $this->old_offset);
$cdrec .= $name;

$this -> ctrl_dir[] = $cdrec;
$this -> old_offset = $new_offset;
return;
}

function add_file($data, $name) {
$fp = fopen($data,"r");
$data = fread($fp,filesize($data));
fclose($fp);
$name = str_replace("", "/", $name);
$unc_len = strlen($data);
$crc = crc32($data);
$zdata = gzcompress($data);
$zdata = substr ($zdata, 2, -4);
$c_len = strlen($zdata);
$fr = "\x50\x4b\x03\x04";
$fr .= "\x14\x00";
$fr .= "\x00\x00";
$fr .= "\x08\x00";
$fr .= "\x00\x00\x00\x00";
$fr .= pack("V",$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 .="\x00\x00\x00\x00";
$cdrec .= pack("V",$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";
}
}

// Test this class
$zipTest = new zipfile();
$zipTest->add_dir("images/");
$zipTest->add_file("images/box1.jpg", "images/box1.jpg");
$zipTest->add_file("images/box2.jpg", "images/box2.jpg");

// Return Zip File to Browser
Header("Content-type: application/octet-stream");
Header ("Content-disposition: attachment; filename=zipTest.zip");
echo $zipTest->file();

// Alternatively, you can write the file to the file system and provide a link:
/*
$filename = "output.zip";
$fd = fopen ($filename, "wb");
$out = fwrite ($fd, $zipTest -> file());
fclose ($fd);

echo "Click here to download the new zip file.";
*/



?>