PHP implementation of MurmurHash3_x64_128.
Just install Composer and run composer require z38/murmurhash in your project directory.
$hash = new Z38\MurmurHash\Murmur3F();
$hash->write('The quick brown fox jumps over the lazy dog.');
echo bin2hex($hash->sum()); // c902e99e1f4899cde7b68789a3a15d69