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Ben Ramey
211
production/classes/misc/zip.inc.php
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211
production/classes/misc/zip.inc.php
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<?php
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/**
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* Class to dynamically create a zip file (archive)
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*
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* @author Rochak Chauhan
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*/
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class createZip {
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public $compressedData = array();
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public $centralDirectory = array(); // central directory
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public $endOfCentralDirectory = "\x50\x4b\x05\x06\x00\x00\x00\x00"; //end of Central directory record
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public $oldOffset = 0;
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/**
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* Function to create the directory where the file(s) will be unzipped
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*
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* @param $directoryName string
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*
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*/
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public function addDirectory($directoryName = 'default/') {
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$directoryName = str_replace("\\", "/", $directoryName);
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$feedArrayRow = "\x50\x4b\x03\x04";
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$feedArrayRow .= "\x0a\x00";
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$feedArrayRow .= "\x00\x00";
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$feedArrayRow .= "\x00\x00";
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$feedArrayRow .= "\x00\x00\x00\x00";
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$feedArrayRow .= pack("V",0);
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$feedArrayRow .= pack("V",0);
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$feedArrayRow .= pack("V",0);
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$feedArrayRow .= pack("v", strlen($directoryName) );
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$feedArrayRow .= pack("v", 0 );
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$feedArrayRow .= $directoryName;
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$feedArrayRow .= pack("V",0);
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$feedArrayRow .= pack("V",0);
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$feedArrayRow .= pack("V",0);
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$this -> compressedData[] = $feedArrayRow;
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$newOffset = strlen(implode("", $this->compressedData));
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$addCentralRecord = "\x50\x4b\x01\x02";
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$addCentralRecord .="\x00\x00";
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$addCentralRecord .="\x0a\x00";
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$addCentralRecord .="\x00\x00";
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$addCentralRecord .="\x00\x00";
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$addCentralRecord .="\x00\x00\x00\x00";
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$addCentralRecord .= pack("V",0);
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$addCentralRecord .= pack("V",0);
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$addCentralRecord .= pack("V",0);
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$addCentralRecord .= pack("v", strlen($directoryName) );
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$addCentralRecord .= pack("v", 0 );
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$addCentralRecord .= pack("v", 0 );
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$addCentralRecord .= pack("v", 0 );
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$addCentralRecord .= pack("v", 0 );
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$ext = "\x00\x00\x10\x00";
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$ext = "\xff\xff\xff\xff";
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$addCentralRecord .= pack("V", 16 );
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$addCentralRecord .= pack("V", $this -> oldOffset );
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$this -> oldOffset = $newOffset;
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$addCentralRecord .= $directoryName;
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$this -> centralDirectory[] = $addCentralRecord;
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}
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/**
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* Function to add file(s) to the specified directory in the archive
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*
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* @param $directoryName string
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*
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*/
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function addFiles($array) {
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if (is_array($array)) {
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foreach ($array as $file) {
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$this->addFile($file);
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}
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} else {
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$fileContents = file_get_contents($array);
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$this->addFile($array);
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}
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}
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public function addFile($data, $directoryName = 'default/') {
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$directoryName = str_replace("\\", "/", $directoryName);
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$feedArrayRow = "\x50\x4b\x03\x04";
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$feedArrayRow .= "\x14\x00";
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$feedArrayRow .= "\x00\x00";
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$feedArrayRow .= "\x08\x00";
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$feedArrayRow .= "\x00\x00\x00\x00";
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$uncompressedLength = strlen($data);
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$compression = crc32($data);
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$gzCompressedData = gzcompress($data);
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$gzCompressedData = substr( substr($gzCompressedData, 0, strlen($gzCompressedData) - 4), 2);
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$compressedLength = strlen($gzCompressedData);
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$feedArrayRow .= pack("V",$compression);
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$feedArrayRow .= pack("V",$compressedLength);
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$feedArrayRow .= pack("V",$uncompressedLength);
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$feedArrayRow .= pack("v", strlen($directoryName) );
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$feedArrayRow .= pack("v", 0 );
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$feedArrayRow .= $directoryName;
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$feedArrayRow .= $gzCompressedData;
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$feedArrayRow .= pack("V",$compression);
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$feedArrayRow .= pack("V",$compressedLength);
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$feedArrayRow .= pack("V",$uncompressedLength);
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$this -> compressedData[] = $feedArrayRow;
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$newOffset = strlen(implode("", $this->compressedData));
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$addCentralRecord = "\x50\x4b\x01\x02";
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$addCentralRecord .="\x00\x00";
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$addCentralRecord .="\x14\x00";
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$addCentralRecord .="\x00\x00";
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$addCentralRecord .="\x08\x00";
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$addCentralRecord .="\x00\x00\x00\x00";
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$addCentralRecord .= pack("V",$compression);
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$addCentralRecord .= pack("V",$compressedLength);
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$addCentralRecord .= pack("V",$uncompressedLength);
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$addCentralRecord .= pack("v", strlen($directoryName) );
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$addCentralRecord .= pack("v", 0 );
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$addCentralRecord .= pack("v", 0 );
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$addCentralRecord .= pack("v", 0 );
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$addCentralRecord .= pack("v", 0 );
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$addCentralRecord .= pack("V", 32 );
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$addCentralRecord .= pack("V", $this -> oldOffset );
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$this -> oldOffset = $newOffset;
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$addCentralRecord .= $directoryName;
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$this -> centralDirectory[] = $addCentralRecord;
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}
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/**
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* Fucntion to return the zip file
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*
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* @return zipfile (archive)
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*/
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public function getZippedfile() {
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$data = implode("", $this -> compressedData);
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$controlDirectory = implode("", $this -> centralDirectory);
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return
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$data.
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$controlDirectory.
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$this -> endOfCentralDirectory.
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pack("v", sizeof($this -> centralDirectory)).
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pack("v", sizeof($this -> centralDirectory)).
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pack("V", strlen($controlDirectory)).
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pack("V", strlen($data)).
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"\x00\x00";
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}
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/**
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*
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* Function to force the download of the archive as soon as it is created
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*
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* @param archiveName string - name of the created archive file
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*/
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public function forceDownload($archiveName) {
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$headerInfo = '';
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if(ini_get('zlib.output_compression')) {
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ini_set('zlib.output_compression', 'Off');
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}
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// Security checks
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if( $archiveName == "" ) {
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echo "<html><title>Public Photo Directory - Download </title><body><BR><B>ERROR:</B> The download file was NOT SPECIFIED.</body></html>";
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exit;
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}
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elseif ( ! file_exists( $archiveName ) ) {
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echo "<html><title>Public Photo Directory - Download </title><body><BR><B>ERROR:</B> File not found.</body></html>";
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exit;
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}
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header("Pragma: public");
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header("Expires: 0");
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header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
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header("Cache-Control: private",false);
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header("Content-Type: application/zip");
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header("Content-Disposition: attachment; filename=".basename($archiveName).";" );
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header("Content-Transfer-Encoding: binary");
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header("Content-Length: ".filesize($archiveName));
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readfile("$archiveName");
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}
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function saveArchive($filename) {
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$fp = fopen($filename, 'wb');
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fwrite($fp, $this->getZippedFile());
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@fclose($fp);
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}
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}
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?>
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