返回 key 中字符串值的子字符
    Parameters:
    string $key
    int $start
    int $end
    Returns: the substring
    Declared in: Redis
    Links: https://redis.io/commands/getrange
    Source:
    S:/Software/JetBrains/PHPStorm/App/PhpStorm-2020.2.1.win/plugins/php/lib/php.jar!/stubs/redis/Redis.php
    getRange on redis.io

    1. <?php
    2. //连接本地的 Redis 服务
    3. $redis = new Redis();
    4. $redis->connect('10.1.3.15', 6379);
    5. $redis->auth('kuaicdn_redis_passwd');
    6. $redis->flushAll();
    7. $ret['exec'][]=$redis->set('list_test1','value1');
    8. $ret['exec'][]=$redis->set('list_test2','value2');
    9. $ret['exec'][]=$redis->set('list_test3','value3');
    10. $ret['exec'][]=$redis->set('list_test4','value4');
    11. $ret['exec'][]=$redis->set('list_test5','value512345');
    12. $ret['exec'][]=$redis->set('list_test6','value6',['nx', 'ex' => 10]);
    13. $ret['ret'][]=$redis->getrange ('list_test5',0,-1);
    14. $ret['ret'][]=$redis->getrange ('list_test5',5,8);
    15. print_r($ret);
    16. ?>

    返回值:

    1. Array
    2. (
    3. [exec] => Array
    4. (
    5. [0] => 1
    6. [1] => 1
    7. [2] => 1
    8. [3] => 1
    9. [4] => 1
    10. [5] => 1
    11. )
    12. [ret] => Array
    13. (
    14. [0] => value512345
    15. [1] => 5123
    16. )
    17. )