php man page for hash_update_file

HASH_UPDATE_FILE(3)							 1						       HASH_UPDATE_FILE(3)

hash_update_file - Pump data into an active hashing context from a file

SYNOPSIS
       bool hash_update_file NULL (resource  $hcontext, string	$filename, [resource  $scontext])

DESCRIPTION
PARAMETERS
	      o $hcontext
		- Hashing context returned by hash_init(3).

	      o $filename
		- URL describing location of file to be hashed; Supports fopen wrappers.

	      o $scontext
		- Stream context as returned by stream_context_create(3).

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

SEE ALSO
       hash_init(3), hash_update(3), hash_update_stream(3), hash_final(3), hash(3), hash_file(3).

PHP Documentation Group 												       HASH_UPDATE_FILE(3)