| Phar::MD5 (integer) | 0x0001 | signature with md5 hash algorithm |
| Phar::SHA1 (integer) | 0x0002 | signature with sha1 hash algorithm |
| Phar::SHA256 (integer) | 0x0003 | signature with sha256 hash algorithm (requires hash extension) |
| Phar::SHA512 (integer) | 0x0004 | signature with sha512 hash algorithm (requires hash extension) |
| Phar::OPENSSL (integer) | 0x0010 | signature with OpenSSL public/private key pair. This is a true, asymmetric key signature. |