(no version information, might be only in CVS)
Hashing context returned by hash_init().
Open file handle as returned by any stream creation function.
Maximum number of characters to copy from handle
into the hashing context.
Actual number of bytes added to the hashing context from handle.
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: