Returns true if the phar archive is based on the tar/phar/zip file format depending on the parameter
$format
format
Either Phar::PHAR, Phar::TAR, or Phar::ZIP to test for the format of the archive.
Phar::PHAR
Phar::TAR
Phar::ZIP
Returns true if the phar archive matches the file format requested by the parameter
true
PharException is thrown if the parameter is an unknown file format specifier.