Here is the Zip Code. Pretty Standard Stuff
<?php
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)
// 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";
$fr .= "\x00\x00";
$fr .= "\x00\x00\x00\x00";
$fr .= pack("V",0); // crc32
$fr .= pack("V",0); // compressed filesize
$fr .= pack("V",0); // uncompressed size
$fr .= pack("v", strlen($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 file 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 need to extract
$cdrec .="\x00\x00"; // gen purpose bit flag
$cdrec .="\x00\x00"; // compression method
$cdrec .="\x00\x00\x00\x00"; // last mod time and 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 the file in archive. Add Path if you want
{
$name = str_replace("\\","/", $name);
// $name = str_replace("\\","\\\\", $name);
$fr = "\x50\x4b\x03\x04";
$fr .= "\x14\x00"; // version needed to extract
$fr .= "\x00\x00"; // general 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 archived 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 the central 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 .="\x00\x00\x00\x00"; // last mod time and 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", $this -> old_offset ); // relative offset of local header
// echo "old offset is ".$this->old_offset.", new offset is $new_offset<br>";
$this -> old_offset = $new_offset;
$cdrec .= $name;
// optional extra field, file comment goes here
// save to central directory
$this -> ctrl_dir[] = $cdrec;
}
function file()
{ // dunp out file
$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 central directory
pack("V", strlen($data)). // offset to start of central directory
"\x00\x00"; // .zip file comment length
}
}
// End of Zip Section
?>
