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php queue, how to design scheduled tasks?
1. Use the open source MQ message queue software (lightweight recommended)2. Use MySQL+crontab to implement it yourself3. The redis list can also be implemented
crontab
You can write one that always runs in the background
while(true){ // 业务处理代码 sleep($time) }
You can control time through $time.
Please describe the problem clearly. What application scenarios do you need to use resident processes?
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
1. Use the open source MQ message queue software (lightweight recommended)
2. Use MySQL+crontab to implement it yourself
3. The redis list can also be implemented
crontab
You can write one that always runs in the background
You can control time through $time.
Please describe the problem clearly. What application scenarios do you need to use resident processes?