/libraries/backend/CreateZipFile/CreateZipFile.inc.php
PHP | 220 lines | 156 code | 10 blank | 54 comment | 9 complexity | 8ab900e4e037e597bf3ad5b7bf9f3086 MD5 | raw file
- <?php
- /**
- * Class to dynamically create a zip file (archive) of file(s) and/or directory
- *
- * @author Rochak Chauhan www.rochakchauhan.com
- * @package CreateZipFile
- * @see Distributed under "General Public License"
- *
- * @version 1.0
- */
- class CreateZipFile {
- public $compressedData = array();
- public $centralDirectory = array(); // central directory
- public $endOfCentralDirectory = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record
- public $oldOffset = 0;
- /**
- * Function to create the directory where the file(s) will be unzipped
- *
- * @param string $directoryName
- * @access public
- * @return void
- */
- public function addDirectory($directoryName) {
- $directoryName = str_replace("\\", "/", $directoryName);
- $feedArrayRow = "\x50\x4b\x03\x04";
- $feedArrayRow .= "\x0a\x00";
- $feedArrayRow .= "\x00\x00";
- $feedArrayRow .= "\x00\x00";
- $feedArrayRow .= "\x00\x00\x00\x00";
- $feedArrayRow .= pack("V",0);
- $feedArrayRow .= pack("V",0);
- $feedArrayRow .= pack("V",0);
- $feedArrayRow .= pack("v", strlen($directoryName) );
- $feedArrayRow .= pack("v", 0 );
- $feedArrayRow .= $directoryName;
- $feedArrayRow .= pack("V",0);
- $feedArrayRow .= pack("V",0);
- $feedArrayRow .= pack("V",0);
- $this->compressedData[] = $feedArrayRow;
- $newOffset = strlen(implode("", $this->compressedData));
- $addCentralRecord = "\x50\x4b\x01\x02";
- $addCentralRecord .="\x00\x00";
- $addCentralRecord .="\x0a\x00";
- $addCentralRecord .="\x00\x00";
- $addCentralRecord .="\x00\x00";
- $addCentralRecord .="\x00\x00\x00\x00";
- $addCentralRecord .= pack("V",0);
- $addCentralRecord .= pack("V",0);
- $addCentralRecord .= pack("V",0);
- $addCentralRecord .= pack("v", strlen($directoryName) );
- $addCentralRecord .= pack("v", 0 );
- $addCentralRecord .= pack("v", 0 );
- $addCentralRecord .= pack("v", 0 );
- $addCentralRecord .= pack("v", 0 );
- $addCentralRecord .= pack("V", 16 );
- $addCentralRecord .= pack("V", $this->oldOffset );
- $this->oldOffset = $newOffset;
- $addCentralRecord .= $directoryName;
- $this->centralDirectory[] = $addCentralRecord;
- }
- /**
- * Function to add file(s) to the specified directory in the archive
- *
- * @param string $directoryName
- * @param string $data
- * @return void
- * @access public
- */
- public function addFile($data, $directoryName) {
- $directoryName = str_replace("\\", "/", $directoryName);
- $feedArrayRow = "\x50\x4b\x03\x04";
- $feedArrayRow .= "\x14\x00";
- $feedArrayRow .= "\x00\x00";
- $feedArrayRow .= "\x08\x00";
- $feedArrayRow .= "\x00\x00\x00\x00";
- $uncompressedLength = strlen($data);
- $compression = crc32($data);
- $gzCompressedData = gzcompress($data);
- $gzCompressedData = substr( substr($gzCompressedData, 0, strlen($gzCompressedData) - 4), 2);
- $compressedLength = strlen($gzCompressedData);
- $feedArrayRow .= pack("V",$compression);
- $feedArrayRow .= pack("V",$compressedLength);
- $feedArrayRow .= pack("V",$uncompressedLength);
- $feedArrayRow .= pack("v", strlen($directoryName) );
- $feedArrayRow .= pack("v", 0 );
- $feedArrayRow .= $directoryName;
- $feedArrayRow .= $gzCompressedData;
- $feedArrayRow .= pack("V",$compression);
- $feedArrayRow .= pack("V",$compressedLength);
- $feedArrayRow .= pack("V",$uncompressedLength);
- $this->compressedData[] = $feedArrayRow;
- $newOffset = strlen(implode("", $this->compressedData));
- $addCentralRecord = "\x50\x4b\x01\x02";
- $addCentralRecord .="\x00\x00";
- $addCentralRecord .="\x14\x00";
- $addCentralRecord .="\x00\x00";
- $addCentralRecord .="\x08\x00";
- $addCentralRecord .="\x00\x00\x00\x00";
- $addCentralRecord .= pack("V",$compression);
- $addCentralRecord .= pack("V",$compressedLength);
- $addCentralRecord .= pack("V",$uncompressedLength);
- $addCentralRecord .= pack("v", strlen($directoryName) );
- $addCentralRecord .= pack("v", 0 );
- $addCentralRecord .= pack("v", 0 );
- $addCentralRecord .= pack("v", 0 );
- $addCentralRecord .= pack("v", 0 );
- $addCentralRecord .= pack("V", 32 );
- $addCentralRecord .= pack("V", $this->oldOffset );
- $this->oldOffset = $newOffset;
- $addCentralRecord .= $directoryName;
- $this->centralDirectory[] = $addCentralRecord;
- }
- /**
- * Function to return the zip file
- *
- * @return zipfile (archive)
- * @access public
- * @return void
- */
- public function getZippedfile() {
- $data = implode("", $this->compressedData);
- $controlDirectory = implode("", $this->centralDirectory);
- return
- $data.
- $controlDirectory.
- $this->endOfCentralDirectory.
- pack("v", sizeof($this->centralDirectory)).
- pack("v", sizeof($this->centralDirectory)).
- pack("V", strlen($controlDirectory)).
- pack("V", strlen($data)).
- "\x00\x00";
- }
- /**
- *
- * Function to force the download of the archive as soon as it is created
- *
- * @param archiveName string - name of the created archive file
- * @access public
- * @return ZipFile via Header
- */
- public function forceDownload($archiveName) {
- if(ini_get('zlib.output_compression')) {
- ini_set('zlib.output_compression', 'Off');
- }
- // Security checkszz
- if( $archiveName == "" ) {
- echo "<html><title>Public Photo Directory - Download </title><body><BR><B>ERROR:</B> The download file was NOT SPECIFIED.</body></html>";
- exit;
- }
- elseif ( ! file_exists( $archiveName ) ) {
- echo "<html><title>Public Photo Directory - Download </title><body><BR><B>ERROR:</B> File not found.</body></html>";
- exit;
- }
- header("Pragma: public");
- header("Expires: 0");
- header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
- header("Cache-Control: private",false);
- header("Content-Type: application/zip");
- header("Content-Disposition: attachment; filename=".basename($archiveName).";" );
- header("Content-Transfer-Encoding: binary");
- header("Content-Length: ".filesize($archiveName));
- readfile("$archiveName");
- }
- /**
- * Function to parse a directory to return all its files and sub directories as array
- *
- * @param string $dir
- * @access protected
- * @return array
- */
- protected function parseDirectory($rootPath, $seperator="/"){
- $fileArray=array();
- $handle = opendir($rootPath);
- while( ($file = @readdir($handle))!==false) {
- if($file !='.' && $file !='..'){
- if (is_dir($rootPath.$seperator.$file)){
- $array=$this->parseDirectory($rootPath.$seperator.$file);
- $fileArray=array_merge($array,$fileArray);
- }
- else {
- $fileArray[]=$rootPath.$seperator.$file;
- }
- }
- }
- return $fileArray;
- }
- /**
- * Function to Zip entire directory with all its files and subdirectories
- *
- * @param string $dirName
- * @access public
- * @return void
- */
- public function zipDirectory($dirName, $outputDir) {
- if (!is_dir($dirName)){
- trigger_error("CreateZipFile FATAL ERROR: Could not locate the specified directory $dirName", E_USER_ERROR);
- }
- $tmp=$this->parseDirectory($dirName);
- $count=count($tmp);
- $this->addDirectory($outputDir);
- for ($i=0;$i<$count;$i++){
- $fileToZip=trim($tmp[$i]);
- $newOutputDir=substr($fileToZip,0,(strrpos($fileToZip,'/')+1));
- $outputDir=$outputDir.$newOutputDir;
- $fileContents=file_get_contents($fileToZip);
- $this->addFile($fileContents,$fileToZip);
- }
- }
- }
- ?>