Posted by Steve on 04/08/07 15:05

"Sam Jost" <radeldudel@gmail.com> wrote in message
news:1175979197.336542.15970@n76g2000hsh.googlegroups.com...
|I want to add a script to a website to backup the files.
|
| So I'd like to compress all the files of the website in one zip archiv
| for the user to download.
|
| Problem is, exec is disabled for security reasons.
|
| Is there any way to create *any* kind of single archive for my website
| using php without exec? It does not need to be zip, any single file
| would do nicely.

you can use this class with your own function that recurses
directories...here's how you would do a single dir:


$archive = new zipArchive();
$localDirectory = '/path/to/some/dir';
while (($fileName = readdir($localDirectory)) !== false)
{
if ($fileName == '.' || $fileName == '..'){ continue; }
$archive->addFile(basename($fileName), file_get_contents($fileName));
}
file_put_contents($fileName, $archive->getArchive());



and here's the class:


<?
class zipArchive
{
public $zipData = array();
public $archive = array();
public $endOfArchive = "\x50\x4b\x05\x06\x00\x00\x00\x00";
public $oldOffset = 0;

public function addDirectory($directoryName)
{
$directoryName = str_replace('\\', '/', $directoryName);
$header = "\x50\x4b\x03\x04";
$header .= "\x0a\x00";
$header .= "\x00\x00";
$header .= "\x00\x00";
$header .= "\x00\x00\x00\x00";
$header .= pack('V', 0);
$header .= pack('V', 0);
$header .= pack('V', 0);
$header .= pack('v', strlen($directoryName));
$header .= pack('v', 0 );
$header .= $directoryName;
$header .= pack('V', 0);
$header .= pack('V', 0);
$header .= pack('V', 0);
$this->zipData[] = $header;
$newOffset = strlen(implode('', $this->zipData));
$directory = "\x50\x4b\x01\x02";
$directory .= "\x00\x00";
$directory .= "\x0a\x00";
$directory .= "\x00\x00";
$directory .= "\x00\x00";
$directory .= "\x00\x00\x00\x00";
$directory .= pack('V', 0);
$directory .= pack('V', 0);
$directory .= pack('V', 0);
$directory .= pack('v', strlen($directoryName));
$directory .= pack('v', 0 );
$directory .= pack('v', 0 );
$directory .= pack('v', 0 );
$directory .= pack('v', 0 );
$directory .= pack('V', 16 );
$directory .= pack('V', $this->oldOffset);
$directory .= $directoryName;
$this->oldOffset = $newOffset;
$this->archive[] = $directory;
}

public function addFile($fileName, $data)
{
$fileName = str_replace('\\', '/', $fileName);
$header = "\x50\x4b\x03\x04";
$header .= "\x14\x00";
$header .= "\x00\x00";
$header .= "\x08\x00";
$header .= "\x00\x00\x00\x00";
$uncompressedLength = strlen($data);
$compression = crc32($data);
$gZippedData = gzcompress($data);
$gZippedData = substr(substr($gZippedData, 0,
strlen($gZippedData) - 4), 2);
$compressedLength = strlen($gZippedData);
$header .= pack('V', $compression);
$header .= pack('V', $compressedLength);
$header .= pack('V', $uncompressedLength);
$header .= pack('v', strlen($fileName) );
$header .= pack('v', 0 );
$header .= $fileName;
$header .= $gZippedData;
$header .= pack('V', $compression);
$header .= pack('V', $compressedLength);
$header .= pack('V', $uncompressedLength);
$this->zipData[] = $header;
$newOffset = strlen(implode('', $this->zipData));
$fileData = "\x50\x4b\x01\x02";
$fileData .= "\x00\x00";
$fileData .= "\x14\x00";
$fileData .= "\x00\x00";
$fileData .= "\x08\x00";
$fileData .= "\x00\x00\x00\x00";
$fileData .= pack('V', $compression);
$fileData .= pack('V', $compressedLength);
$fileData .= pack('V', $uncompressedLength);
$fileData .= pack('v', strlen($fileName));
$fileData .= pack('v', 0 );
$fileData .= pack('v', 0 );
$fileData .= pack('v', 0 );
$fileData .= pack('v', 0 );
$fileData .= pack('V', 32 );
$fileData .= pack('V', $this->oldOffset);
$fileData .= $fileName;
$this->oldOffset = $newOffset;
$this->archive[] = $fileData;
}

public function getArchive()
{
$data = implode('', $this->zipData);
$controlDirectory = implode('', $this->archive);
return $data .
$controlDirectory .
$this->endOfArchive .
pack('v', sizeof($this->archive)) .
pack('v', sizeof($this->archive)) .
pack('V', strlen($controlDirectory)) .
pack('V', strlen($data)) .
"\x00\x00";
}
}
?>

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