Example analysis of redis script command execution problems

1. Execute in the redis-cli command line:

# 调用redis命令设置缓存
# 不传参数
eval "return redis.call('set', 'name1', 'Tom')" 0
# 传入1个值参数
eval "return redis.call('set', 'name2', ARGV[1])" 0 "Tom"
# 传入1个键名参数和1个值参数
eval "return redis.call('set', KEYS[1], ARGV[1])" 1 "name3" "Tom"

2. Execute in the linux command line:

# 指定lua脚本路径，后面可跟上参数，与redis-cli中不同，此处不需要指定KEYS的数量，但是需要用英文逗号隔开KEYS和ARGV参数，逗号前后至少保留1个空格，否则报错
redis-cli -a password --eval ./sadd_script.lua subjects , math
redis-cli -a password --eval ./sadd_script.lua subjects , history

Define your own needs in the lua script Business code, demo:

local setName = KEYS[1]
local setValue = ARGV[1]
if string.len(setName) > 0 and string.len(setValue) > 0
then
    return redis.call('sadd', setName, setValue)
else
    return 0
end

3, executed in php code:

<?php
$redis = new Redis();
$redis->connect(&#39;192.168.1.201&#39;, 6379);
$redis->auth(&#39;123456&#39;);
$script = <<<EOF
    return redis.call(&#39;lpush&#39;, KEYS[1], ARGV[1])
EOF;
$key1 = &#39;goods_list&#39;;
$value1 = mt_rand(10000, 99999);
//eval($script, $args = array(), $numKeys = 0)，numKeys声明args参数中KEYS数量，剩下的则都为ARGV参数
$res = $redis->eval($script, [$key1, $value1], 1);
var_dump($res);

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