hash_update_stream
(PHP 5 >= 5.1.2, PECL hash:1.1-1.5)
hash_update_stream — Pump data into an active hashing context from an open stream
说明
int hash_update_stream
( resource $context
, resource $handle
[, int $length
] )
参数
- 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.
返回值
Actual number of bytes added to the hashing context from handle .
范例
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);
?>
上例将输出：
5c6ffbdd40d9556b73a21e63c3e0e904