Pump data into an active hashing context from an open stream

# hash_update_stream

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

hash_update_stream — Pump data into an active hashing context from an open stream

### Description

hash_update_stream(HashContext `$context`, resource `$stream`, int `$length` = -1): int

### Parameters

`context`

  Hashing context returned by hash_init().

`stream`

  Open file handle as returned by any stream creation function.

`length`

  Maximum number of characters to copy from `stream` into the hashing context.

### Return Values

Actual number of bytes added to the hashing context from `stream`.

### Changelog

Version | Description
--- | ---
7.2.0 | Accept HashContext instead of resource.

### Examples

Example #1 hash_update_stream() example

`<?php
$fp = tmpfile();
fwrite($fp, 'jumped over the lazy dog.');
rewind($fp);
$ctx = hash_init('sha256');
hash_update($ctx, 'The quick brown fox ');
hash_update_stream($ctx, $fp);
echo hash_final($ctx);
?>`

The above example will output:

    68b1282b91de2c054c36629cb8dd447f12f096d3e3c587978dc2248444633483

### See Also

- hash_init() - Initialize an incremental hashing context
- hash_update() - Pump data into an active hashing context
- hash_final() - Finalize an incremental hash and return resulting digest

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open