attempting to work out conversion/compression API

Hi folks, How does this look for a conversion/compression API? We need to allow the conversion of whole archives as well as the compression of whole archives. For zip/phar file formats, we need to allow the compression/decompression of individual files within the archive To satisfy these three requirements, I'd like to use these methods: void PharFileInfo->compress(int $compression) // first 4 throw exceptions on failure like other Phar methods void PharFileInfo->decompress() void Phar->compressFiles(int $compression) void Phar->decompressFiles() Phar|PharData Phar->convert(int $archivetype[, int $compression = Phar::NONE][, bool $executable = true][, string $file_extension]) $archivetype could be any of Phar::PHAR, Phar::TAR or Phar::ZIP. $compression could be any of Phar::NONE, Phar::GZ, or Phar::BZ2 $executable is used to determine whether a Phar or PharData object is returned. If true, $archivetype must be Phar::TAR or Phar::ZIP $file_extension can be set to override the automatic renaming (format/compression-dependent) convert returns a new object either of Phar or PharData based on the $executable parameter. Example code: <?php // $phar is "blah.phar" Phar $phar = new Phar('blah.phar'); // $newphar is "blah.tar.gz" PharData $newphar = $phar->convert(Phar::TAR, Phar::GZ, false); // $zipphar is "blah.zip.phar" Phar $zipphar = $newphar->convert(Phar::ZIP); // $compphar is "blah.phar.bz2" Phar $compphar = $phar->convert(Phar::PHAR, Phar::BZ2); $zipphar->compressFiles(Phar::BZ2); // all internal files compressed with bzip2 $zipphar->decompressFiles(); // all internal files decompressed $phar['a.php']->compress(Phar::GZ); // a.php is compressed with gzip compression inside blah.phar $phar['a.txt']->decompress(); // a.txt is decompressed. ?> Greg