hash_update_stream
(PHP 5 >= 5.1.2, PECL hash >= 1.1)
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 = -1 ] )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 以上例程会输出：
<?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);
?>
5c6ffbdd40d9556b73a21e63c3e0e904
参见
- 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
