PHP's level to fflate's.
PHP accepts -1 for "the library default", which zlib defines as 6. fflate has no such sentinel, so -1 has to be resolved here rather than passed through.
PHP's level to fflate's.
PHP accepts -1 for "the library default", which zlib defines as 6. fflate has no such sentinel, so -1 has to be resolved here rather than passed through.