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hash_pbkdf2	hash_update_file

Hash Functions	Last updated: Mon, 26 Oct 2026

hash_update

(PHP 5 >= 5.1.2, PHP 7, PHP 8, PECL hash >= 1.1)

hash_update — Pump data into an active hashing context

Description

function hash_update(HashContext $context, string $data): true

Parameters

context: Hashing context returned by hash_init().
data: Message to be included in the hash digest.

Return Values

Always returns true.

Changelog

Version	Description
8.4.0	Now has a return type of true instead of bool.
7.2.0	Accept HashContext instead of resource.

See Also

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_final() - Finalize an incremental hash and return resulting digest

hash_pbkdf2	hash_update_file

Hash Functions	Last updated: Mon, 26 Oct 2026