<?php
$path = "/tmp/phar.phar";
if (is_file($path)) { unlink($path); }
$phar = new Phar($path);
$phar->startBuffering();
$phar->addFromString('test.txt', 'text');
$phar->setStub('<?php echo "STUB!\n"; __HALT_COMPILER();');
$phar->stopBuffering();
echo file_get_contents("phar://$path/test.txt")."\n";