   #PHP Manual String functions setlocale sha1

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                                   sha1_file

   (PHP 4 >= 4.3.0)
   sha1_file -- Calculate the sha1 hash of a file

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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