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Reference and ManualHosting Glossary PHP HTML 4.01 CSS 2.0 Core Javascript 1.5 XHTML 1.0
sha1_fileDescriptionstring 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.
See also sha1(), crc32(), and md5_file()
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