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
Description
int hash_update_stream
( resource
$context
, resource $handle
[, int $length = -1
] )Parameters
-
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
handleinto the hashing context.
Return Values
Actual number of bytes added to the hashing context from handle.
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
Коментарии
This can be obvious, but hash_update_stream() move file pointer. So, use rewind(), if you plan to read the file after hashing.