(PECL ssdeep >= 1.0.0)
ssdeep_fuzzy_compare — Calculates the match score between two fuzzy hash signatures
ssdeep_fuzzy_compare ( string $signature1 , string $signature2 ) : int
Calculates the match score between signature1 and signature2 using » context-triggered piecewise hashing, and returns the match score.
signature1
The first fuzzy hash signature string.
signature2
The second fuzzy hash signature string.
Returns an integer from 0 to 100 on success, false otherwise.
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https://www.php.net/manual/en/function.ssdeep-fuzzy-compare.php