Phar::getSignature — Return MD5/SHA1/SHA256/SHA512 signature of a Phar archive
Returns the verification signature of a phar archive in a hexadecimal string.
Array with the opened archive's signature in "hash" key and "md5", "sha1", "sha256", or "sha512" in "hash_type". This signature is a hash calculated on the entire phar's contents, and may be used to verify the integrity of the archive. A valid signature is absolutely required of all phar-based phars if the phar.require_hash INI variable is set to true.