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个人理解在项目中使用消息队列一般是有如下几个原因:
redis实现消息队列步骤如下: 1).redis函数rpush,lpop 2).建议定时任务入队列 3)创建定时任务出队列
文件:demo.php插入数据到redis队列 <?php $redis = new Redis(); $redis->connect('127.0.0.1',6379); $password = '123456'; $redis->auth($password); $arr = array('h','e','l','l','o','w','o','r','l','d'); foreach($arr as $k=>$v){ $redis->rpush("mylist",$v); } 文件:index.php定时扫描出队列 <?php $redis = new Redis(); $redis->connect('127.0.0.1',6379); $password = '123456'; $redis->auth($password); //list类型出队操作 $value = $redis->lpop('mylist'); if($value){ echo "出队的值".$value; }else{ echo "出队完成"; } ?> 建立定时任务 */1 * * * * root php /wwwroot/workplace/redis/index.php */3 * * * * root php /wwwroot/workplace/redis/demo.php
tail -f /var/log/cron 查看定时任务执行情况 Nov 7 00:30:01 dongzi CROND[6888]: (root) CMD (php /wwwroot/workplace/redis/demo.php) Nov 7 00:30:01 dongzi CROND[6890]: (root) CMD (php /wwwroot/workplace/redis/index.php ) 定时任务执行队列写入结果如下 127.0.0.1:6379> lrange mylist 0 -1 1) "h" 2) "e" 3) "l" 4) "l" 5) "o" 6) "w" 7) "o" 8) "r" 9) "l" 10) "d" 定时任务执行出队列后: 127.0.0.1:6379> lrange mylist 0 -1 1) "e" 2) "l" 3) "l" 4) "o" 5) "w" 6) "o" 7) "r" 8) "l" 9) "d"
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