Message Digest (hash) engine. Allows direct or incremental processing of arbitrary length messages using a variety of hashing algorithms.
Aviso |
The Tiger algorithm implementation is currently broken on some non-x86 platforms, like PowerPC and SPARC. You may track changes in the Bug report. |
The Hash extension requires no external libraries and is enabled by default as of PHP 5.1.2. It may be explicitly disabled by using the --disable-hash switch to configure. Earlier versions of PHP may incorporate the Hash extension by installing the PECL module.
Estas constantes están definidas por esta extensión y estarán disponibles solamente cuando la extensión ha sido o bien compilada dentro de PHP o grabada dinámicamente en tiempo de ejecución.
Optional flag for hash_init(). Indicates that the HMAC digest-keying algorithm should be applied to the current hashing context.