- <?php
- $z = new PHPZip();
- $file = array('1.jpg');
- $zipname = time() . '.zip';
- $z->Zip($file, $zipname);
- /**
- 以下是其他调用这个类的方法：
- $z = new PHPZip(); //新建立一个zip的类
- 方法一：
- $z -> Zip("", "out1.zip"); //添加当前目录和子目录下的所有档案
- 方法二：
- $files=array('1.txt','gb.txt');
- $files[]='5.txt';
- $z -> Zip($files, "out2.zip"); //添加文件列表
- 方法三：
- $z -> Zip("/usr/local/sext/", "out3.zip"); //添加指定目录
- */
- class PHPZip
- {
- function Zip($dir, $zipfilename)
- {
- if (@function_exists('gzcompress'))
- {
- $curdir = getcwd();
- if (is_array($dir))
- {
- $filelist = $dir;
- }
- else
- {
- $filelist = $this -> GetFileList($dir);
- }
- if ((!emptyempty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);
- else chdir($curdir);
- if (count($filelist)>0)
- {
- foreach($filelist as $filename)
- {
- if (is_file($filename))
- {
- $fd = fopen ($filename, "r");
- $content = fread ($fd, filesize ($filename));
- fclose ($fd);
- if (is_array($dir)) $filename = basename($filename);
- $this -> addFile($content, $filename);
- }
- }
- $out = $this -> file();
- chdir($curdir);
- $fp = fopen($zipfilename, "w");
- fwrite($fp, $out, strlen($out));
- fclose($fp);
- }
- return 1;
- }
- else return 0;
- }
- function GetFileList($dir)
- {
- if (file_exists($dir))
- {
- $args = func_get_args();
- $pref = $args[1];
- $dh = opendir($dir);
- while($files = readdir($dh))
- {
- if (($files!=".")&&($files!=".."))
- {
- if (is_dir($dir.$files))
- {
- $curdir = getcwd();
- chdir($dir.$files);
- $file = array_merge($file, $this -> GetFileList("", "$pref$files/"));
- chdir($curdir);
- }
- else $file[]=$pref.$files;
- }
- }
- closedir($dh);
- }
- return $file;
- }
- var $datasec = array();
- var $ctrl_dir = array();
- var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
- 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);
- $c_len = strlen($zdata);
- $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug
- $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;
- $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 .= $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 = $new_offset;
- $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 'PHPZip' class
- ?>
本文转自许琴 51CTO博客，原文链接：http://blog.51cto.com/xuqin/882336，如需转载请自行联系原作者
