php 한글 메뉴얼 도움말 검색 사이트 Pump data into an active hashing context from an open stream [function.hash-update-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