下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。
| Constant | Value | Description |
|---|---|---|
| Phar::NONE (integer) | 0x00000000 | no compression |
| Phar::COMPRESSED (integer) | 0x0000F000 | bitmask that can be used with file flags to determine if any compression is present |
| Phar::GZ (integer) | 0x00001000 | zlib (gzip) compression |
| Phar::BZ2 (integer) | 0x00002000 | bzip2 compression |
| Constant | Value | Description |
|---|---|---|
| Phar::SAME (integer) | 0 | retain the same file format |
| Phar::PHAR (integer) | 1 | phar file format |
| Phar::TAR (integer) | 2 | tar file format |
| Phar::ZIP (integer) | 3 | zip file format |
| Constant | Value | Description |
|---|---|---|
| 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. |
| Constant | Value | Description |
|---|---|---|
| Phar::PHP (integer) | 1 | used to instruct the mimeoverrides parameter of Phar::webPhar() that the extension should be parsed as a PHP file |
| Phar::PHPS (integer) | 2 | used to instruct the mimeoverrides parameter of Phar::webPhar() that the extension should be parsed as a PHP source file through highlight_file() |