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功能：将文件压缩成zip，或者rar的压缩包。后缀名可以自定义。
使用方法：首先实例化，然后传参。两个参数。
第一个关于文件地址的一个Array。
第二个是要保存的压缩包文件的绝对地址。
php zip压缩类的调用方法：
- $zipfiles =array("/root/pooy/test1.txt","/root/pooy/test2.txt");
- $z = new PHPZip();
- //$randomstr = random(8);
- $zipfile = TEMP."/photocome_".$groupid.".zip";
- $z->Zip($zipfiles, $zipfile); //添加文件列表
PHP的ZIP压缩类：
# - # PHPZip v1.2 by Sext (sext@neud.net) 2002-11-18
- # (Changed: 2003-03-01)
- #
- # Makes zip archive
- #
- # Based on "Zip file creation class", uses zLib
- #
- #
- class PHPZip
- {
- function Zip($dir, $zipfilename)
- {
- if (@function_exists('gzcompress'))
- {
- $curdir = getcwd();
- if (is_array($dir))
- {
- $filelist = $dir;
- }
- else
- {
- $filelist = $this -> GetFileList($dir);
- }
if ((!empty($dir))&&(!is_array($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'] $timearray['year'] = 1980; - $timearray['mon'] = 1;
- $timearray['mday'] = 1;
- $timearray['hours'] = 0;
- $timearray['minutes'] = 0;
- $timearray['seconds'] = 0;
- } // end if
return (($timearray['year'] - 1980) ($timearray['hours'] > 1); - } // end of the 'unix2DosTime()' method
/** - * Adds "file" to archive
- *
- * @param string file contents
- * @param string name of the file in the archive (may contains the path)
- * @param integer the current timestamp
- *
- * @access public
- */
- function addFile($data, $name, $time = 0)
- {
- $name = str_replace('\\', '//m.sbmmt.com/m/', $name);
$dtime = dechex($this->unix2DosTime($time)); - $hexdtime = '\x' . $dtime[6] . $dtime[7]
- Western union point . '\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 - ?>
老外实现的php zip压缩类，个人感觉还是不错的，里面有大量php实用函数的应用技巧，特别是函数pack、crc32、gzcompress等函数的应用，值得学习借鉴。 |
