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Title : PHP Zip Class - Generate zip with php
Categories : PHP, PHP Classes, Compression Click here to Update Your Picture
ced da
Date : Sep 15th 2006
Grade : 3 of 5 (graded 5 times)
Viewed : 6698
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zip class written by eric mueller, changed, that you can open the zip files with the windows zip-programm

<?php
/* $Id: zip.lib.php,v 1.1 2004/02/14 15:21:18 anoncvs_tusedb Exp $ */
// vim: expandtab sw=4 ts=4 sts=4:


/**
* Zip file creation class.
* Makes zip files.
*
* Last Modification and Extension By :
*
*  Hasin Hayder
*  HomePage : www.hasinme.info
*  Email : countdraculla@gmail.com
*  IDE : PHP Designer 2005
*
*
* Originally Based on :
*
*  http://www.zend.com/codex.php?id=535&single=1
*  By Eric Mueller <eric@themepark.com>
*
*  http://www.zend.com/codex.php?id=470&single=1
*  by Denis125 <webmaster@atlant.ru>
*
*  a patch from Peter Listiak <mlady@users.sourceforge.net> for last modified
*  date and time of the compressed file
*
* Official ZIP file format: http://www.pkware.com/appnote.txt
*
* @access  public
*/
class zipfile
{
   
/**
     * Array to store compressed data
     *
     * @var  array    $datasec
     */
   
var $datasec      = array();

   
/**
     * Central directory
     *
     * @var  array    $ctrl_dir
     */
   
var $ctrl_dir     = array();

   
/**
     * End of central directory record
     *
     * @var  string   $eof_ctrl_dir
     */
   
var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";

   
/**
     * Last offset position
     *
     * @var  integer  $old_offset
     */
   
var $old_offset   = 0;


   
/**
     * Converts an Unix timestamp to a four byte DOS date and time format (date
     * in high two bytes, time in low two bytes allowing magnitude comparison).
     *
     * @param  integer  the current Unix timestamp
     *
     * @return integer  the current date in a four byte DOS format
     *
     * @access private
     */
   
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);
    }
// end of the 'unix2DosTime()' method

   
function addDir($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;


    }


   
/**
     * Adds "file" to archive
     *
     * @param  string   file contents
     * @param  string   name of the file in the archive (may contains the path)
     * @param  integer  the current timestamp
     *
     * @access public
     */
   
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);
       
$zdata   = substr(substr($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;

       
// "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;

       
// now add to 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 .= $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
       
$this -> old_offset += strlen($fr);

       
$cdrec .= $name;

       
// optional extra field, file comment goes here
        // save to central directory
       
$this -> ctrl_dir[] = $cdrec;
    }
// end of the 'addFile()' method


    /**
     * Dumps out file
     *
     * @return  string  the zipped file
     *
     * @access public
     */
   
function 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 dir
           
pack('V', strlen($data)) .              // offset to start of central dir
           
"\x00\x00";                             // .zip file comment length
   
} // end of the 'file()' method


    /**
     * A Wrapper of original addFile Function
     *
     * Created By Hasin Hayder at 29th Jan, 1:29 AM
     *
     * @param array An Array of files with relative/absolute path to be added in Zip File
     *
     * @access public
     */
   
function addFiles($files /*Only Pass Array*/)
    {
        foreach(
$files as $file)
        {
        if (
is_file($file)) //directory check
       
{
           
$data = implode("",file($file));
                   
$this->addFile($data,$file);
                }
        }
    }

   
/**
     * A Wrapper of original file Function
     *
     * Created By Hasin Hayder at 29th Jan, 1:29 AM
     *
     * @param string Output file name
     *
     * @access public
     */
   
function output($file)
    {
       
$fp=fopen($file,"w");
       
fwrite($fp,$this->file());
       
fclose($fp);
    }



}
// end of the 'zipfile' class
?>


Example:
<?php
include("zip.class.php");
$ziper = new zipfile();
$ziper->addDir("test_dir");
$ziper->addFile("test.txt","test_dir/test_output.txt"); //array of files
$ziper->output("myzip.zip");
?>



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 Alex Walker wrote :1674
This looks great, but I`m afraid I`m having trouble making it work. Whenever I run it, I get the following error:


Notice: Undefined variable: crc in C:\Apache\htdocs\nvs\support\zip.class.php on line 115

Notice: Undefined variable: c_len in C:\Apache\htdocs\nvs\support\zip.class.php on line 116

Notice: Undefined variable: unc_len in C:\Apache\htdocs\nvs\support\zip.class.php on line 117