Zipfile   A
last analyzed

Complexity

Total Complexity 5

Size/Duplication

Total Lines 137
Duplicated Lines 0 %

Importance

Changes 0
Metric Value
wmc 5
eloc 66
dl 0
loc 137
rs 10
c 0
b 0
f 0

3 Methods

Rating   Name   Duplication   Size   Complexity  
A file() 0 10 1
A unix2DosTime() 0 13 3
A addFile() 0 57 1
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<?php
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// 
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/**
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 * package::i.tools
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 *
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 * php-downloader    v1.0    -    www.ipunkt.biz
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 *
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 * (c)    2002 - www.ipunkt.biz (rok)
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 *
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 * Zip file creation class.
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 * Makes zip files.
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 *
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 * Based on :
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 *
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 *       http://www.zend.com/codex.php?id=535&single=1
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 *       By Eric Mueller <[email protected]>
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 *
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 *       http://www.zend.com/codex.php?id=470&single=1
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 *       by Denis125 <[email protected]>
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 *
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 *       a patch from Peter Listiak <[email protected]> for last modified
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 *       date and time of the compressed file
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 *
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 * Official ZIP file format: http://www.pkware.com/appnote.txt
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 *
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 * @copyright (c)    2002 - www.ipunkt.biz (rok)
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 * @access           public
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 * @package          kernel
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 * @subpackage       core
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 */
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class Zipfile
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{
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    /**
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     * Array to store compressed data
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     *
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     * @var array $datasec
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     */
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    public $datasec = array();
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    /**
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     * Central directory
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     *
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     * @var array $ctrl_dir
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     */
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    public $ctrl_dir = array();
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    /**
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     * End of central directory record
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     *
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     * @var string $eof_ctrl_dir
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     */
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    public $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
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    /**
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     * Last offset position
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     *
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     * @var integer $old_offset
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     */
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    public $old_offset = 0;
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    /**
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     * Converts an Unix timestamp to a four byte DOS date and time format (date
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     * in high two bytes, time in low two bytes allowing magnitude comparison).
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     *
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     * @param int $unixtime the current Unix timestamp
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     *
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     * @return integer the current date in a four byte DOS format
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     * @access   private
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     */
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    public function unix2DosTime($unixtime = 0)
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    {
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        $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
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        if ($timearray['year'] < 1980) {
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            $timearray['year']    = 1980;
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            $timearray['mon']     = 1;
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            $timearray['mday']    = 1;
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            $timearray['hours']   = 0;
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            $timearray['minutes'] = 0;
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            $timearray['seconds'] = 0;
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        } // end if
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        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
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    } // end of the 'unix2DosTime()' method
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    /**
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     * Adds "file" to archive
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     *
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     * @param string  $data file contents
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     * @param string  $name name of the file in the archive (may contains the path)
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     * @param integer $time the current timestamp
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     * @access   public
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     */
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    public function addFile($data, $name, $time = 0)
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    {
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        $name = str_replace('\\', '/', $name);
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        $dtime    = dechex($this->unix2DosTime($time));
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        $hexdtime = '\x' . $dtime[6] . $dtime[7] . '\x' . $dtime[4] . $dtime[5] . '\x' . $dtime[2] . $dtime[3] . '\x' . $dtime[0] . $dtime[1];
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        eval('$hexdtime = "' . $hexdtime . '";');
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        $fr = "\x50\x4b\x03\x04";
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        $fr .= "\x14\x00"; // ver needed to extract
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        $fr .= "\x00\x00"; // gen purpose bit flag
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        $fr .= "\x08\x00"; // compression method
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        $fr .= $hexdtime; // last mod time and date
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        // "local file header" segment
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        $unc_len = strlen($data);
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        $crc     = crc32($data);
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        $zdata   = gzcompress($data);
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        $zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
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        $c_len   = strlen($zdata);
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        $fr .= pack('V', $crc); // crc32
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        $fr .= pack('V', $c_len); // compressed filesize
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        $fr .= pack('V', $unc_len); // uncompressed filesize
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        $fr .= pack('v', strlen($name)); // length of filename
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        $fr .= pack('v', 0); // extra field length
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        $fr .= $name;
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        // "file data" segment
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        $fr .= $zdata;
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        // "data descriptor" segment (optional but necessary if archive is not
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        // served as file)
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        $fr .= pack('V', $crc); // crc32
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        $fr .= pack('V', $c_len); // compressed filesize
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        $fr .= pack('V', $unc_len); // uncompressed filesize
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        // add this entry to array
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        $this->datasec[] = $fr;
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        $new_offset      = strlen(implode('', $this->datasec));
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        // now add to central directory record
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        $cdrec = "\x50\x4b\x01\x02";
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        $cdrec .= "\x00\x00"; // version made by
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        $cdrec .= "\x14\x00"; // version needed to extract
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        $cdrec .= "\x00\x00"; // gen purpose bit flag
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        $cdrec .= "\x08\x00"; // compression method
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        $cdrec .= $hexdtime; // last mod time & date
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        $cdrec .= pack('V', $crc); // crc32
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        $cdrec .= pack('V', $c_len); // compressed filesize
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        $cdrec .= pack('V', $unc_len); // uncompressed filesize
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        $cdrec .= pack('v', strlen($name)); // length of filename
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        $cdrec .= pack('v', 0); // extra field length
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        $cdrec .= pack('v', 0); // file comment length
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        $cdrec .= pack('v', 0); // disk number start
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        $cdrec .= pack('v', 0); // internal file attributes
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        $cdrec .= pack('V', 32); // external file attributes - 'archive' bit set
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        $cdrec .= pack('V', $this->old_offset); // relative offset of local header
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        $this->old_offset = $new_offset;
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        $cdrec .= $name;
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        // optional extra field, file comment goes here
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        // save to central directory
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        $this->ctrl_dir[] = $cdrec;
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    } // end of the 'addFile()' method
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    /**
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     * Dumps out file
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     *
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     * @return string the zipped file
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     * @access public
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     */
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    public function file()
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    {
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        $data    = implode('', $this->datasec);
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        $ctrldir = implode('', $this->ctrl_dir);
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        return $data . $ctrldir . $this->eof_ctrl_dir . pack('v', count($this->ctrl_dir)) . // total # of entries "on this disk"
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               pack('v', count($this->ctrl_dir)) . // total # of entries overall
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               pack('V', strlen($ctrldir)) . // size of central dir
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               pack('V', strlen($data)) . // offset to start of central dir
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               "\x00\x00"; // .zip file comment length
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    } // end of the 'file()' method
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} // end of the 'zipfile' class
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