The following zip creation class by Eric Mueller works well:
?php
/*
Zip file creation class
makes zip files...
use the functions add_dir() and add_file() to build the zip file;
see example code below
by Eric Mueller, [EMAIL PROTECTED], http://www.themepark.com
BASED ON zip file creation class
FOUND AT http://www.zend.com/codex.php?id=470single=1
BY denis125 ([EMAIL PROTECTED])
*/
// official ZIP file format: http://www.pkware.com/appnote.txt
class zipfile
{
var $datasec = array(); // array to store compressed data
var $ctrl_dir = array(); // central directory
var $eof_ctrl_dir = \x50\x4b\x05\x06\x00\x00\x00\x00; //end of Central
directory record
var $old_offset = 0;
function add_dir($name)
// adds directory to archive - do this before putting any files in
directory!
// $name - name of directory... like this: path/
// ...then you can add files using add_file with names like
path/file.txt
{
$name = str_replace(\\, /, $name);
$fr = \x50\x4b\x03\x04;
$fr .= \x0a\x00;// ver needed to extract
$fr .= \x00\x00;// gen purpose bit flag
$fr .= \x00\x00;// compression method
$fr .= \x00\x00\x00\x00; // last mod time and date
$fr .= pack(V,0); // crc32
$fr .= pack(V,0); //compressed filesize
$fr .= pack(V,0); //uncompressed filesize
$fr .= pack(v, strlen($name) ); //length of pathname
$fr .= pack(v, 0 ); //extra field length
$fr .= $name;
// end of local file header segment
// no file data segment for path
// 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));
// ext. file attributes mirrors MS-DOS directory attr byte, detailed
// at http://support.microsoft.com/support/kb/articles/Q125/0/19.asp
// now add to central record
$cdrec = \x50\x4b\x01\x02;
$cdrec .=\x00\x00;// version made by
$cdrec .=\x0a\x00;// version needed to extract
$cdrec .=\x00\x00;// gen purpose bit flag
$cdrec .=\x00\x00;// compression method
$cdrec .=\x00\x00\x00\x00; // last mod time date
$cdrec .= pack(V,0); // crc32
$cdrec .= pack(V,0); //compressed filesize
$cdrec .= pack(V,0); //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
$ext = \x00\x00\x10\x00;
$ext = \xff\xff\xff\xff;
$cdrec .= pack(V, 16 ); //external file attributes - 'directory'
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 array
$this - ctrl_dir[] = $cdrec;
}
function add_file($data, $name)
// adds file to archive
// $data - file contents
// $name - name of file in archive. Add path if your want
{
$name = str_replace(\\, /, $name);
//$name = str_replace(\\, , $name);
$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 .= \x00\x00\x00\x00; // last mod time and date
$unc_len = strlen($data);
$crc = crc32($data);
$zdata = gzcompress($data);
$zdata = substr( substr($zdata, 0, strlen($zdata) - 4), 2); // fix
crc bug
$c_len = strlen($zdata);
$fr .= pack(V,$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;
// end of local file header segment
// 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 central directory record
$cdrec =
