Description
string
sha1_file ( string filename [, bool raw_output] )
Calculates the sha1 hash of filename using the
US Secure Hash Algorithm 1,
and returns that hash. The hash is a 40-character hexadecimal number.
Upon failure, FALSE is returned. If the optional
raw_output is set to TRUE, then the sha1 digest
is instead returned in raw binary format with a length of 20.
Note:
The optional raw_output parameter was added in
PHP 5.0.0 and defaults to FALSE
See also sha1(), crc32(),
and md5_file()
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