predisHow can I use PHP and Redis to get a reverse range of scores?

Using PHP and Redis, you can get a reverse range of scores by using the ZREVRANGE command. This command takes a start and end score as arguments and returns the elements in the sorted set stored at the key with a score between the start and end.

For example, if you have a Redis sorted set stored at the key scores that contains the following elements:

scores
1) "bob"
2) "alice"
3) "jane"

You can use the following code to get a reverse range of scores between 0 and 10:

$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

$result = $redis->zRevRange('scores', 0, 10);

var_dump($result);

The output of the above code would be:

array(3) {
  [0]=>
  string(4) "jane"
  [1]=>
  string(5) "alice"
  [2]=>
  string(3) "bob"
}

The code consists of the following parts:

1. Connecting to the Redis server: $redis = new Redis(); $redis->connect('127.0.0.1', 6379);
2. Executing the ZREVRANGE command: $result = $redis->zRevRange('scores', 0, 10);
3. Printing the result: var_dump($result);

Helpful links

• Redis Docs - ZREVRANGE
• PHP Redis Docs - ZREVRANGE

Edit this code on GitHub