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PHP5中文手册
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.
资源类型
This extension defines a Hashing Context resource returned by
hash_init().
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.
Table of Contents- 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)
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