<?php
try {
$p = new Phar('/path/to/my.phar', 0, 'my.phar');
$p['myfile.txt'] = 'hi';
$file = $p['myfile.txt'];
var_dump($file->isCompressedBZIP2());
$p['myfile.txt']->setCompressedBZIP2();
var_dump($file->isCompressedBZIP2());
} catch (Exception $e) {
echo 'Create/modify operations on my.phar failed: ', $e;
}
?>
The above example will output: