###Purpose redis bloomFilter as a cache filtering，a web object is cached only when it has been accessed at least once. I‘m going to assume that a lot of vicious access are never written to the cache, and then query from database that increase the disk read workload. Further, filtering out the one-hit-wonders also saves cache space on disk, increasing the cache hit rates.

Required

redis >= 2.2 lua >= 5.1 php >= 5.6 luabit stable

###Example

#add
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
$script = file_get_contents('add.lua');
$sha = $redis->script('load', $script);
$test = $redis->evalSha($sha,['[email protected]']);
echo $redis->getLastError();

#check
$redis = new Redis();
$redis->connect('127.0.0.1');
$script = file_get_contents('check.lua');
$sha = $redis->script('load', $script);
$ret = $redis->evalSha($sha,['[email protected]']);
echo $ret;
echo $redis->getLastError();