Understand cron concepts
The cron daemon is a small subsystem composed of utilities and configuration files. cron of a certain style can be found in almost all UNIX-like systems. CronComponents include the daemon itself, a set of system-wide
Cron is a Linux scheduled execution tool that can run jobs without human intervention. Since cron is a built-in service in Linux, but it does not automatically get up, you can use the following methods to start and close this service:
There is no solution for PHP itself to execute scheduled tasks, but it is completed by using the sleep function. In this way, you need to make some configuration in advance, such as the implementation process:
(); (0); =60*30; ();
For PHP itself there is no set of solutions to perform timed tasks, but it is done with the sleep function. Such a party is to do some configuration in advance, such as the implementation process:Ignore_user_abort();//turn off the browser and the
Linux regularly executes PHP files via cron
Additional points:1. To add the path of the interpreter to the PHP file header, usually #!/usr/bin/php2. Grant the
In linux, php regularly executes cron tasks. There is no solution for PHP itself to execute scheduled tasks, but it is completed by using the sleep function. This approach requires some configuration in advance, such as the implementation process:
Linux's implementation of php's scheduled cron task does not have a solution for PHP itself to execute the scheduled task, but it is completed by using the sleep function. In this way, you need to make some configuration in advance, such as the
linux PHP to implement a cron task on a timed basis There is no solution for PHP itself to perform timed tasks, but with the sleep function. This side is to do some early configuration, such as the implementation of the process: Code as follows:
There is no solution for PHP itself to perform timed tasks, but with the sleep function. This side is to do some early configuration, such as the implementation process:
Copy Code code as follows:
Ignore_user_abort ()//Turn off the
Large chains have a big problem. Every day, thousands of trades occur in each store. Company executives want to dig into the data. Which products sell well? What's bad? Where do organic products sell well? How about the sale of ice cream?
To capture
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