0,0 → 1,188 |
<?php |
/* $Id: zip.lib.php,v 2.4 2004/11/03 13:56:52 garvinhicking Exp $ */ |
// vim: expandtab sw=4 ts=4 sts=4: |
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/** |
* Zip file creation class. |
* Makes zip files. |
* |
* 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) | ($timearray['seconds'] >> 1); |
} // end of the 'unix2DosTime()' method |
|
|
/** |
* Adds "file" to archive |
* |
* @param string file contents |
* @param string name of the file in the archive (may contains the path) |
* @param integer the current timestamp |
* |
* @access public |
*/ |
function addFile($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 .= $zdata; |
|
// "data descriptor" segment (optional but necessary if archive is not |
// served as file) |
// nijel(2004-10-19): this seems not to be needed at all and causes |
// problems in some cases (bug #1037737) |
//$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 |
|
} // end of the 'zipfile' class |
?> |