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Ziping a file.

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Hi theere hopes all ok.

on my current project the client wants his music files ziped so users can downaod them ziped.

I have this code so far and is untested does it look ok cheers.

[code]

<?php

$zip=add_file("music/track1.mp3");
$zip=archive();
$zip=save("music/track1.zip");

?>

[/code]

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should of posted the full code can you test this as i have for hours but itdosent work please help cheers.

[code]
my code

<?php

$zipfile = new zipfile(); 

// add the subdirectory ... important!
$zipfile -> add_dir("music/");

// add the binary data stored in the string 'filedata'
$filedata = "(read your file into $filedata)"; 
$zipfile -> add_file($filedata, "music/track1.mp3"); 

// the next three lines force an immediate download of the zip file:
header("Content-type: application/octet-stream"); 
header("Content-disposition: attachment; filename=test.zip"); 
echo $zipfile -> file(); 


// OR instead of doing that, you can write out the file to the loca disk like this:
$filename = "output.zip";
$fd = fopen ($filename, "wb");
$out = fwrite ($fd, $zipfile -> file());
fclose ($fd);

// then offer it to the user to download:
<a href="output.zip">Click here to download the new zip file.</a>

?>



class

<?php

/*

Zip file creation class
makes zip files on the fly...

use the functions add_dir() and add_file() to build the zip file;
see example code below

by Eric Mueller
http://www.themepark.com

v1.1 9-20-01
  - added comments to example

v1.0 2-5-01

initial version with:
  - class appearance
  - add_file() and file() methods
  - gzcompress() output hacking
by Denis O.Philippov, webmaster@atlant.ru, http://www.atlant.ru

*/

// 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 = "\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 & 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", $this -> old_offset ); //relative offset of local header
//      &n // bsp; echo "old offset is ".$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() { // dump 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 dir
            pack("V", strlen($data)).                // offset to start of central dir
            "\x00\x00";                            // .zip file comment length
    }


?>
[/code]

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Here is downloadable example with the added date fix, that if not used can result in a corrupt zip file, if a date is out of range for many different zip applications!


me!

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