hash Functions

简介

Message Digest (hash) engine. Allows direct or incremental processing of arbitrary length messages using a variety of hashing algorithms.

需求

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.

预定义常量

以下常量由本扩展模块定义,因此只有在本扩展模块被编译到 PHP 中,或者在运行时被动态加载后才有效。

HASH_HMAC (integer)
Optional flag for hash_init(). Indicates that the HMAC digest-keying algorithm should be applied to the current hashing context.

目录

hash_algos - Return a list of registered hashing algorithms
hash_file - Generate a hash value using the contents of a given file
hash_final - Finalize an incremental hash and return resulting digest
hash_hmac_file - Generate a keyed hash value using the HMAC method and the contents of a given file
hash_hmac - Generate a keyed hash value using the HMAC method
hash_init - Initialize an incremental hashing context
hash_update_file - Pump data into an active hashing context from a file
hash_update_stream - Pump data into an active hashing context from an open stream
hash_update - Pump data into an active hashing context
hash - Generate a hash value (message digest)