hash_update_stream Pump data into an active hashing context from an open stream

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


<?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);
?>