PHP基于redis计数器类定义与用法示例

<?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['host'],$this->_config['port'],$this->_config['timeout'],$this->_config['reserved'],$this->_config['retry_interval']);      if(empty($this->_config['auth'])){        $redis->auth($this->_config['auth']);      }      $redis->select($this->_config['index']);    }catch(RedisException $e){      throw new Exception($e->getMessage());      return false;    }    return $redis;  }} // class end?>

<?phpRequire 'RedisCounter.class.php';// redis连接设定$config = array(  'host' => 'localhost',  'port' => 6379,  'index' => 0,  'auth' => '',  'timeout' => 1,  'reserved' => NULL,  'retry_interval' => 100,);// 创建RedisCounter对象$oRedisCounter = new RedisCounter($config);// 定义保存计数的健值$key = 'mycounter';// 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?>

011110

<?phpRequire 'RedisCounter.class.php';// redis连接设定$config = array(  'host' => 'localhost',  'port' => 6379,  'index' => 0,  'auth' => '',  'timeout' => 1,  'reserved' => NULL,  'retry_interval' => 100,);// 创建RedisCounter对象$oRedisCounter = new RedisCounter($config);// 定义保存计数的健值$key = 'mytestcounter';// 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('/tmp/mytest_result.log', $oRedisCounter->incr($key).PHP_EOL, FILE_APPEND);?>

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

ab -c 15 -n 150 http://localhost/test.phpThis 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).....doneServer Software:    nginx/1.6.3Server Hostname:    localhostServer Port:      80Document Path:     /test.phpDocument 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] receivedConnection 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)

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