(PECL ssdeep >= 1.0.0)
ssdeep_fuzzy_compare — Calculates the match score between two fuzzy hash signatures
$signature1
   , string $signature2
   )
   Calculates the match score between signature1
   and signature2 using » 
   context-triggered piecewise hashing, and returns the match
   score.
  
signature1The first fuzzy hash signature string.
signature2The second fuzzy hash signature string.
   Returns an integer from 0 to 100 on success, FALSE otherwise.