linsert 在列表的元素前或者后插入元素

在列表的主元值之前或之后插入值。参数选项指定插入的位置(之前或之后)。如果列表不存在，或者主元不存在，则不插入值。
使用该函数相当于搜索插入
Parameters:
string $key
int $position Redis::BEFORE | Redis::AFTER
string $pivot
mixed|string $value
Returns:
列表中的元素数，如果主元素不存在，则为-1。
Declared in: Redis
Links: https://redis.io/commands/linsert
Source:
S:/Software/JetBrains/PHPStorm/App/PhpStorm-2020.2.1.win/plugins/php/lib/php.jar!/stubs/redis/Redis.php
lInsert on redis.io

<?php
//连接本地的 Redis 服务
$redis = new Redis();
$redis->connect('10.1.3.15', 6379);
$redis->auth('kuaicdn_redis_passwd');
$redis->flushAll();
$ret['exec'][]=$redis->rPush('list_test','value1');
$ret['exec'][]=$redis->rPush('list_test','value2');
$ret['exec'][]=$redis->rPush('list_test','value3');
$ret['exec'][]=$redis->rPush('list_test','value4');
$ret['exec'][]=$redis->rPush('list_test','value5');
$ret['cmd']['BEFORE']=$redis->lInsert('list_test',Redis::BEFORE,"value3",'BEFORE');
$ret['cmd']['AFTER']=$redis->lInsert('list_test','AFTER',"value3",'AFTER');
$ret['cmd']['NONE']=$redis->lInsert('list_test','BEFORE',"value6",'NONE');
$ret['src'][]=$redis->lRange('list_test',0,-1);
print_r($ret);
?>

返回值:

Array
(
    [exec] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 4
            [4] => 5
        )
    [cmd] => Array
        (
            [BEFORE] => 6
            [AFTER] => 7
            [NONE] => -1
        )
    [src] => Array
        (
            [0] => Array
                (
                    [0] => value1
                    [1] => value2
                    [2] => BEFORE
                    [3] => value3
                    [4] => AFTER
                    [5] => value4
                    [6] => value5
                )
        )
)