(PHP 5 >= 5.3.0, PHP 7, PECL phar >= 2.0.0)
Phar::convertToExecutable — Convert a phar archive to another executable phar archive file format
$format = 9021976
   [, int $compression = 9021976
   [, string $extension
  ]]] ) : PharNote:
此方法需要 将 php.ini 中的
phar.readonly设为0以适合 Phar 对象. 否则, 将抛出PharException.
This method is used to convert a phar archive to another file format. For instance, it can be used to create a tar-based executable phar archive from a zip-based executable phar archive, or from an executable phar archive in the phar file format. In addition, it can be used to apply whole-archive compression to a tar or phar-based archive.
If no changes are specified, this method throws a BadMethodCallException.
If successful, the method creates a new archive on disk and returns a Phar object. The old archive is not removed from disk, and should be done manually after the process has finished.
format
       This should be one of Phar::PHAR, Phar::TAR,
       or Phar::ZIP.  If set to NULL, the existing file format
       will be preserved.
      
compression
       This should be one of Phar::NONE for no whole-archive
       compression, Phar::GZ for zlib-based compression, and
       Phar::BZ2 for bzip-based compression.
      
extension
       This parameter is used to override the default file extension for a
       converted archive.  Note that all zip- and tar-based phar archives must contain
       .phar in their file extension in order to be processed as a
       phar archive.
      
       If converting to a phar-based archive, the default extensions are
       .phar, .phar.gz, or .phar.bz2
       depending on the specified compression.  For tar-based phar archives, the
       default extensions are .phar.tar, .phar.tar.gz,
       and .phar.tar.bz2.  For zip-based phar archives, the
       default extension is .phar.zip.
      
The method returns a Phar object on success and throws an exception on failure.
This method throws BadMethodCallException when unable to compress, an unknown compression method has been specified, the requested archive is buffering with Phar::startBuffering() and has not concluded with Phar::stopBuffering(), an UnexpectedValueException if write support is disabled, and a PharException if any problems are encountered during the phar creation process.
Example #1 A Phar::convertToExecutable() example
Using Phar::convertToExecutable():
<?php
try {
    $tarphar = new Phar('myphar.phar.tar');
    // convert it to the phar file format
    // note that myphar.phar.tar is *not* unlinked
    $phar = $tarphar->convertToExecutable(Phar::PHAR); // creates myphar.phar
    $phar->setStub($phar->createDefaultStub('cli.php', 'web/index.php'));
    // creates myphar.phar.tgz
    $compressed = $phar->convertToExecutable(Phar::TAR, Phar::GZ, '.phar.tgz');
} catch (Exception $e) {
    // handle the error here
}
?>