官方示例 继承 ScriptCommand 重写 getScript方法即可

class IncrementExistingKeysBy extends ScriptCommand
{
      public function getKeysCount()
      {  // Tell Predis to use all the arguments but the last one as arguments
       // for KEYS. The last one will be used to populate ARGV.\  return -1;
      }

      public function getScript()
      {  
         return <<<LUA
            local cmd, insert = redis.call, table.insert
            local increment, results = ARGV[1], { }

            for idx, key in ipairs(KEYS) 
                 if cmd('exists', key) == 1 then 
                     insert(results, idx, cmd('incrby', key, increment))
                 else
                     insert(results, idx, false) end
                end

            return results
            LUA;
       }
}

调用方式

$client = new Predis\Client($single_server, array(
    'profile' => function ($options) {
        $profile = $options->getDefault('profile');
        $profile->defineCommand('increxby', 'IncrementExistingKeysBy');

        return $profile;
    },
));

$client->mset('foo', 10, 'foobar', 100);

var_export($client->increxby('foo', 'foofoo', 'foobar', 50));