search
HomeBackend DevelopmentPHP TutorialDetailed explanation of PHP-based redis counter class

Redis is an open source log-type Key-Value database written in ANSI C language, supports network, can be memory-based and persistent, and provides APIs in multiple languages.

This article will use its incr(increment), get(get), delete(clear) methods to implement the counter kind.
1.Redis counter class code and demonstration example

RedisCounter.class.php

<?php/**
 * PHP基于Redis计数器类
 * Date:    2017-10-28
 * Author:  fdipzone
 * Version: 1.0
 *
 * Descripton:
 * php基于Redis实现自增计数,主要使用redis的incr方法,并发执行时保证计数自增唯一。
 *
 * Func:
 * public  incr    执行自增计数并获取自增后的数值
 * public  get     获取当前计数
 * public  reset   重置计数
 * private connect 创建redis连接
 */class RedisCounter{ // class start

    private $_config;    private $_redis;    /**
     * 初始化
     * @param Array $config redis连接设定
     */
    public function __construct($config){
        $this->_config = $config;
        $this->_redis = $this->connect();
    }    /**
     * 执行自增计数并获取自增后的数值
     * @param  String $key  保存计数的键值
     * @param  Int    $incr 自增数量,默认为1
     * @return Int
     */
    public function incr($key, $incr=1){        return intval($this->_redis->incr($key, $incr));
    }    /**
     * 获取当前计数
     * @param  String $key 保存计数的健值
     * @return Int
     */
    public function get($key){        return intval($this->_redis->get($key));
    }    /**
     * 重置计数
     * @param  String  $key 保存计数的健值
     * @return Int
     */
    public function reset($key){        return $this->_redis->delete($key);
    }    /**
     * 创建redis连接
     * @return Link
     */
    private function connect(){        try{
            $redis = new Redis();
            $redis->connect($this->_config[&#39;host&#39;],$this->_config[&#39;port&#39;],$this->_config[&#39;timeout&#39;],$this->_config[&#39;reserved&#39;],$this->_config[&#39;retry_interval&#39;]);            if(empty($this->_config[&#39;auth&#39;])){
                $redis->auth($this->_config[&#39;auth&#39;]);
            }
            $redis->select($this->_config[&#39;index&#39;]);
        }catch(RedisException $e){            throw new Exception($e->getMessage());            return false;
        }        return $redis;
    }


} // class end?>

demo.php

<?phpRequire &#39;RedisCounter.class.php&#39;;// redis连接设定$config = array(    &#39;host&#39; => &#39;localhost&#39;,    &#39;port&#39; => 6379,    &#39;index&#39; => 0,    &#39;auth&#39; => &#39;&#39;,    &#39;timeout&#39; => 1,    &#39;reserved&#39; => NULL,    &#39;retry_interval&#39; => 100,
);// 创建RedisCounter对象$oRedisCounter = new RedisCounter($config);// 定义保存计数的健值$key = &#39;mycounter&#39;;// 执行自增计数,获取当前计数,重置计数echo $oRedisCounter->get($key).PHP_EOL; // 0echo $oRedisCounter->incr($key).PHP_EOL; // 1echo $oRedisCounter->incr($key, 10).PHP_EOL; // 11echo $oRedisCounter->reset($key).PHP_EOL; // 1echo $oRedisCounter->get($key).PHP_EOL; // 0 ?>

Output:

0
1
11
1
0

2. Concurrently call the counter and check the uniqueness of the count

The test code is as follows:

<?phpRequire &#39;RedisCounter.class.php&#39;;// redis连接设定$config = array(    &#39;host&#39; => &#39;localhost&#39;,    &#39;port&#39; => 6379,    &#39;index&#39; => 0,    &#39;auth&#39; => &#39;&#39;,    &#39;timeout&#39; => 1,    &#39;reserved&#39; => NULL,    &#39;retry_interval&#39; => 100,
);// 创建RedisCounter对象$oRedisCounter = new RedisCounter($config);// 定义保存计数的健值$key = &#39;mytestcounter&#39;;// 执行自增计数并返回自增后的计数,记录入临时文件file_put_contents(&#39;/tmp/mytest_result.log&#39;, $oRedisCounter->incr($key).PHP_EOL, FILE_APPEND);?>

To test concurrent execution, we use the ab tool for testing, and set the execution 150 times, 15 concurrency.

ab -c 15 -n 150 http://localhost/test.php

Execution results:

ab -c 15 -n 150 http://localhost/test.php
This is ApacheBench, Version 2.3 <$Revision: 1554214 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking home.rabbit.km.com (be patient).....done


Server Software:        nginx/1.6.3Server Hostname:        localhost
Server Port:            80Document Path:          /test.php
Document Length:        0 bytesConcurrency Level:      15Time taken for tests:   0.173 secondsComplete requests:      150Failed requests:        0Total transferred:      24150 bytesHTML transferred:       0 bytesRequests per second:    864.86 [#/sec] (mean)Time per request:       17.344 [ms] (mean)
Time per request:       1.156 [ms] (mean, across all concurrent requests)
Transfer rate:          135.98 [Kbytes/sec] received

Connection Times (ms)              min  mean[+/-sd] median   maxConnect:        0    0   0.2      0       1Processing:     3   16   3.2     16      23Waiting:        3   16   3.2     16      23Total:          4   16   3.1     17      23Percentage of the requests served within a certain time (ms)  50%     17
  66%     18
  75%     18
  80%     19
  90%     20
  95%     21
  98%     22
  99%     22
 100%     23 (longest request)

Check whether the count is unique

生成的总计数
wc -l /tmp/mytest_result.log 
     150 /tmp/mytest_result.log生成的唯一计数
sort -u /tmp/mytest_result.log | wc -l
     150

You can see that in the case of concurrent calls, The resulting count is also guaranteed to be unique.

This article explains the relevant content of PHP based on the redis counter class. For more related knowledge, please pay attention to the PHP Chinese website.

Related recommendations:

Detailed explanation of how to check whether PHP matches the specified time period

How to get access with JS Device information method

mysql5.7 export data prompt --secure-file-priv option problem solution

The above is the detailed content of Detailed explanation of PHP-based redis counter class. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
PHP: An Introduction to the Server-Side Scripting LanguagePHP: An Introduction to the Server-Side Scripting LanguageApr 16, 2025 am 12:18 AM

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP and the Web: Exploring its Long-Term ImpactPHP and the Web: Exploring its Long-Term ImpactApr 16, 2025 am 12:17 AM

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

Why Use PHP? Advantages and Benefits ExplainedWhy Use PHP? Advantages and Benefits ExplainedApr 16, 2025 am 12:16 AM

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

Debunking the Myths: Is PHP Really a Dead Language?Debunking the Myths: Is PHP Really a Dead Language?Apr 16, 2025 am 12:15 AM

PHP is not dead. 1) The PHP community actively solves performance and security issues, and PHP7.x improves performance. 2) PHP is suitable for modern web development and is widely used in large websites. 3) PHP is easy to learn and the server performs well, but the type system is not as strict as static languages. 4) PHP is still important in the fields of content management and e-commerce, and the ecosystem continues to evolve. 5) Optimize performance through OPcache and APC, and use OOP and design patterns to improve code quality.

The PHP vs. Python Debate: Which is Better?The PHP vs. Python Debate: Which is Better?Apr 16, 2025 am 12:03 AM

PHP and Python have their own advantages and disadvantages, and the choice depends on the project requirements. 1) PHP is suitable for web development, easy to learn, rich community resources, but the syntax is not modern enough, and performance and security need to be paid attention to. 2) Python is suitable for data science and machine learning, with concise syntax and easy to learn, but there are bottlenecks in execution speed and memory management.

PHP's Purpose: Building Dynamic WebsitesPHP's Purpose: Building Dynamic WebsitesApr 15, 2025 am 12:18 AM

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP: Handling Databases and Server-Side LogicPHP: Handling Databases and Server-Side LogicApr 15, 2025 am 12:15 AM

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

How do you prevent SQL Injection in PHP? (Prepared statements, PDO)How do you prevent SQL Injection in PHP? (Prepared statements, PDO)Apr 15, 2025 am 12:15 AM

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Atom editor mac version download

Atom editor mac version download

The most popular open source editor