(PECL ssdeep >= 1.0.0)
ssdeep_fuzzy_hash_filename — Create a fuzzy hash from a file
$file_name
   )
   ssdeep_fuzzy_hash_filename() calculates the hash 
   of the file specified by file_name using 
   » context-triggered piecewise 
   hashing, and returns that hash.
  
file_nameThe filename of the file to hash.
   Returns a string on success, FALSE otherwise.