_Added in 4.2_

*$crc64(text|&binvar|filename,[N])*

Returns the CRC-64 checksum of the specified item.

*Parameters*

text|&binvar|filename - Value to calculate CRC-64 checksum from.
N - 0 = plain text, 1 = &binvar, 2 = filename (content of the file), 2 is default.