CodeIgniter uses redis steps explained in detail

This time I will bring you a detailed explanation of the steps for using redis with CodeIgniter. What are the precautions for using redis with CodeIgniter? The following is a practical case, let’s take a look.

1. Install redis

First of all, the redis service (redis database) must be installed and running on the computer. For details, see another article ：http://www.jb51.net/article/138173.htm

2. Install phpredis

① Download

Project address:

https://github.com/phpredis/phpredis (you can ignore this), it is mentioned here that the windows version of phpredis needs to be compiled by yourself, of course we cannot So reckless.

Let me talk about the detours I have taken. I downloaded it from http://windows.php.net/downloads/pecl/snaps/redis/20160319/ (you can ignore this), but I still can’t get it. Okay, actually this vc14 is the 7.0 version of PHP, and what we need is the 7.1 version, so it was always wrong and I couldn’t find the problem until I found this:

http://pecl.php.net/ package-stats.php

Click on the corresponding version:

http://pecl.php.net/package/redis/3.1.1/windows

Download 7.1 corresponding version.

② Installation

Place the downloaded and decompressed

php_redis.dll in the ext of the php interpreter. You will find that modules such as mysql are also placed Here, then open php.ini, find ;extension=php_bz2.dll, add extension=php_redis.dll,

is in the extension In the header of the configuration area, add the redis configuration. The installation is complete.

③ Check the configuration information

Restart the server or restart the computer, add a view page under the path of index.php:

phpinfo.php, in Add:

<?php
 echo phpinfo();
?>

and then visit

http://yourdomain.com/phpinfo.php. You can see the configuration information and look for information about successful redis configuration. If so, the configuration is complete. .

3. Operate redis in PHP native way

// 原生redis类库，不需要config/redis.php
$redis = new Redis();
$redis->connect('127.0.0.1',6379);
//$redis->set('key10','xx10',20);//第三个参数是存续时间，单位是秒，如果不填则为永久
echo $redis->get('key10');

4. Configure redis.php

Create the file redis.php under myApplication/config:

<?php
defined(&#39;BASEPATH&#39;) OR exit(&#39;No direct script access allowed&#39;);
/**
 * Created by PhpStorm.
 * Date: 2017/2/9
 * Time: 13:32
 */
$config[&#39;socket_type&#39;] = &#39;tcp&#39;;
$config[&#39;host&#39;] = &#39;127.0.0.1&#39;;
$config[&#39;password&#39;] = NULL;
$config[&#39;port&#39;] = 6379;
$config[&#39;timeout&#39;] = 0;
?>

Whether you are using the framework’s redis library or the following custom redis library, you need this

Configuration file .

In addition to configuring redis.php, the cache type we use must also be configured in

application/config/config.php. The default is like this:

$config['sess_driver'] = 'files';
$config['sess_cookie_name'] = 'ci_session';
$config['sess_expiration'] = 7200;
$config['sess_save_path'] = NULL;
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 300;
$config['sess_regenerate_destroy'] = FALSE;

If we use redis, then the configuration should be similar to this:

$config['sess_driver'] = 'redis';
$config['sess_cookie_name'] = 'ci_session';
$config['sess_expiration'] = 0;
$config['sess_save_path'] = 'tcp://127.0.0.1:xxxx';
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 600;
$config['sess_regenerate_destroy'] = TRUE;

5. Using the redis library of the CI framework

// 框架的redis库
$this->load->driver('cache');
$this->cache->redis->save('key11','xx11');//这里注意，第三个参数是时间，在自定义redis库会说明
echo $this->cache->redis->get('key11');

6. Use a custom redis class library

① Rediscli_default.php

The custom redis class library can be downloaded from system/libraries/ Make a copy of Cache/drivers/Cache_redis.php and rename it to Rediscli_default.php. The class name is also changed to Rediscli_default. Otherwise, there is no need to change. You can add more methods yourself. Place it under myApplication/libraries/Rediscli/drivers/

② Rediscli.php

Create a Rediscli.php## under myApplication/libraries/Rediscli/ #

<?php
defined ( &#39;BASEPATH&#39; ) or exit ( &#39;No direct script access allowed&#39; );
/**
 * Created by PhpStorm.
 * Date: 2017/2/9
 * Time: 20:00
 */
class Rediscli extends CI_Driver_Library {
 public $valid_drivers;
 public $CI;
 function construct() {
  $this->CI = & get_instance ();
  $this->valid_drivers = array (
   &#39;default&#39;
  );
 }
}

③ Call

// 自定义类，需要配置
$this->load->driver('rediscli');
if ($this->rediscli->default->is_supported())
{
 echo $this->rediscli->default->get('key2');
}

④ Time

This custom redis library is the same as the framework library, focus here Explain.

$this->cache->redis->save('key11','xx11',1000);

This is the saved value. The third parameter is the time. This time cannot be omitted. By looking at the function, you can see that the default value of this parameter is 60 seconds, not permanent, so this parameter cannot be omitted.

7. Pay attention to this situation

// 文本存储
$this->load->driver('cache',array('adapter'=>'redis','backup'=>'file'));
$this->cache->save('key5','xx5',10000);
echo $this->cache->get('key5');//xx5

The meaning of this code is to use redis to store it first. If it is not found, use Text storage. You will find that text files are stored in myApplication/cache, and each key will have one text.

Because no error is reported, you may not know where this data exists for a while.

It’s better to use this less often. After all, redis is used for faster speed.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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The above is the detailed content of CodeIgniter uses redis steps explained in detail. For more information, please follow other related articles on the PHP Chinese website!