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, 'The quick brown fox jumped over the lazy dog.');
rewind($fp);

$ctx = hash_init('md5');
hash_update_stream($ctx, $fp);
echo hash_final($ctx);
?>

The above example will output:

5c6ffbdd40d9556b73a21e63c3e0e904

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
  • hash() - Generate a hash value (message digest)
  • hash_file() - Generate a hash value using the contents of a given file