PharData::setSignatureAlgorithm Set the signature algorithm for a phar and apply it &reftitle.description; public voidPharData::setSignatureAlgorithm intalgo stringnullprivateKey&null; &phar.write; Set the signature algorithm for a phar and apply it. The signature algorithm must be one of Phar::MD5, Phar::SHA1, Phar::SHA256, Phar::SHA512, or Phar::OPENSSL. &reftitle.parameters; algo One of Phar::MD5, Phar::SHA1, Phar::SHA256, Phar::SHA512, or Phar::OPENSSL &reftitle.returnvalues; &return.void; &reftitle.errors; Throws UnexpectedValueException for many errors, BadMethodCallException if called for a zip- or a tar-based phar archive, and a PharException if any problems occur flushing changes to disk. &reftitle.changelog; &Version; &Description; 8.0.0 privateKey is now nullable. &reftitle.seealso; Phar::getSupportedSignatures Phar::getSignature