| span style="color: #0000BB"><?php/** * Class to dynamically create a zip file (archive) * * @author Rochak Chauhan */class createZip { var $compressedData = array(); var $centralDirectory = array(); // central directory var $endOfCentralDirectory = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record var $oldOffset = 0; /** * Function to create the directory where the file(s) will be unzipped * * @param $directoryName string * */ function addDirectory($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 ); $ext = "\x00\x00\x10\x00"; $ext = "\xff\xff\xff\xff"; $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 $directoryName string * */ function addFile($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; } /** * Fucntion to return the zip file * * @return zipfile (archive) */ 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($data)). "\x00\x00"; } /** * * Function to force the download of the archive as soon as it is created * * @param archiveName string - name of the created archive file */ function forceDownload($archiveName, $get_file_name) { $headerInfo = ''; if(ini_get('zlib.output_compression')) { ini_set('zlib.output_compression', 'Off'); } // Security checks if( $archiveName == "" ) { echo "<html><title>var Photo Directory - Download </title><body><BR><B>ERROR:</B> The download file was NOT SPECIFIED.</body></html>"; exit; } elseif ( ! file_exists( $archiveName ) ) { echo "<html><title>var Photo Directory - Download </title><body><BR><B>ERROR:</B> File not found.</body></html>"; exit; } header("Pragma: public"); header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Cache-Control: private",false); header("Content-Type: application/java-archive"); header("Content-Disposition: attachment; filename=".$get_file_name.";" ); header("Content-Transfer-Encoding: binary"); header("Content-Length: ".filesize($archiveName)); readfile("$archiveName"); }}?> |
