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authorpabs <pabs@pablotron.org>2007-08-22 21:26:39 -0400
committerpabs <pabs@pablotron.org>2007-08-22 21:26:39 -0400
commitf11b211f154ec56dc860a2b3bfadb17f2a3325dc (patch)
tree3fa7c90051fb4a24eb9af11f6b8cbc42c7bd4e19 /extras/zipfile.class.php
downloadzipstream-php-f11b211f154ec56dc860a2b3bfadb17f2a3325dc.tar.bz2
zipstream-php-f11b211f154ec56dc860a2b3bfadb17f2a3325dc.zip
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+<?php
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ *
+ * @version $Id$
+ */
+
+/**
+ * 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
+?>