hash_update_stream

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

hash_update_streamPump data into an active hashing context from an open stream

설명

int hash_update_stream ( resource $context , resource $handle [, int $length = -1 ] )

인수

context

Hashing context returned by hash_init().

handle

Open file handle as returned by any stream creation function.

length

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

반환값

Actual number of bytes added to the hashing context from handle.

예제

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);
?>

위 예제의 출력:

5c6ffbdd40d9556b73a21e63c3e0e904

참고

  • 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

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User Contributed Notes 1 note

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1
qiuty at mail dot ru
3 years ago
This can be obvious, but hash_update_stream() move file pointer. So, use rewind(), if you plan to read the file after hashing.
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