How to store array data into redis in PHP

Question

In my project, I want to store array data into redis.

Here I use PHP.

First, It connects to redis successfully. And then I defined a array which name should be info_g_1.

Last, I use mset function to store this arry.

Here is my php code:

<?php
$redis_obj = \common\Datasource::getRedis('instance1');//connect to redis successfully
$id = '1';
$r_goods = 'info_g_' . $id;
$r_goods = array(
 'sys_status' => 'one',
 'num_user' => 'two'
);

$redis_obj->mset($r_goods);

But unlucky, It works fail. Thers is no info_g_1 data in my redis.

    $redis_obj->sadd('info_g_'.$id,'one');
    $redis_obj->sadd('info_g_'.$id,'two');

and fetch data:

    $redis_obj->smembers('info_g_'.$id); //can get one and two.

But this way, I am not sure whether one belongs to sys_status or num_user.

Who can help me?

mset sets data, r_goods does not contain info_g_1. What's your question about? — u_mulder
– u_mulder, Commented Jun 28, 2018 at 7:01
you need to set somthing like this $redis->mset(array('yourKEY' => 'yourValue')); — DsRaj
– DsRaj, Commented Jun 28, 2018 at 7:04
As per the above code, if you search for 'sys_status' then you if find the value 'one' — DsRaj
– DsRaj, Commented Jun 28, 2018 at 7:05
@DsRaj, I want to set a array, not a key-value. If i choose $redis->mset(array('yourKEY' => 'yourValue')); There will be many keys in redis. And it is not allowed — stack
– stack, Commented Jun 28, 2018 at 8:16

Lovepreet Singh · Accepted Answer · 2018-06-28 08:32:04Z

1

The value in variable $r_goods is overwritten by array in next line in following code:

$r_goods = 'info_g_' . $id;
$r_goods = array(
 'sys_status' => 'one',
 'num_user' => 'two'
);

The actual value in $r_goods is:

array(
     'sys_status' => 'one',
     'num_user' => 'two'
    );

Also you can set it as:

$redis_obj->set('info_g_' . $id, 'value to store');

Update: To add multiple key-value pairs, mset can be used as set:

$redis_obj->mset($r_goods);

But if want to store array as values corresponding to key. Then need to json_encode array first & then set as follows:

$redis_obj->set('key', json_encode(array('sys_status' => 'one', 'num_user' => 'two')));

And can be retrieved as:

$array = json_decode($redis_obj->get('key'), true);

This reason behind this is, redis store only strings no other data type.

edited Jun 28, 2018 at 8:32

answered Jun 28, 2018 at 7:17

Lovepreet Singh

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2 Comments

stack Over a year ago

Actually, I want to set a array not a key-value. So set function can not fix my problem

Lovepreet Singh Over a year ago

Answer Updated!

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