(PHP 5 >= 5.1.2, PECL hash:1.1-1.5)
hash_update_file — Pump data into an active hashing context from a file
Hashing context returned by hash_init().
URL describing location of file to be hashed; Supports fopen wrappers.
Stream context as returned by stream_context_create().
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.