PHP does not support multi-threading. Sometimes it is not so fun to deal with problems. Learn from it.

How to add scheduled tasks to execute php files in Linux system

How to add a scheduled task to execute a php file in the Linux system? PHP does not support multi-threading, and sometimes it is not so comfortable to deal with the problem. The editor of Study La takes the php file as an example to explain the scheduled tasks under Linux.

Linux system adds scheduled tasks to execute php files

1. Open the Linux system command line interface.

Enter the following command in the command line interface: whichphplinux php scheduled task, and press Enter.

1. Remember the php path in the previous step, continue to enter: crontab-e at the command line, press Enter, press the "i" key to enter the editing mode of the vi editor. What system is linux? In the current mode Enter the following command:

10,40,50****/usr/bin/php/opt/lampp/htdocs/wechat/xjtest-web_browser/pcntl_test.php

That is: scheduled task execution frequency + php executable file path + php file path to be executed. (The end of the article will explain in detail the execution frequency of the command)

After the input is completed, press the "ESC" key and enter ":" on the current command line linux php scheduled task, enter "wq" after ":", and then press Enter, the following prompt will appear , proving that the scheduled task is added successfully.

Execution frequency of Linux scheduled tasks:

The frequency of the beginning part of the command consists of five parts, representing minutes, hours, days, months, and weeks (0 is Sunday). When the current frequency is all executed, it is represented by "*", so there will be so many "*"s. The following examples can help you understand:

The scheduled tasks below will still run

*****[command]

The scheduled task below will run at 0 minutes of each hour (that is, executed once every hour)

0****[command]

Below is still a scheduled task that runs every hour. But it runs at a quarter of an hour (1:15, 2:15...)

15****[command]

The scheduled task below is executed once every night, at 2:30

302***[command]

The scheduled tasks below are executed at midnight on the 2nd of every month (for example: 00:00 on February 2, 2010)

002**[command]

The scheduled task below will be executed once every hour and 0 minutes every Monday

0***1[command]

The following will run 3 times every hour, at 0 minutes, 10 minutes, and 20 minutes

0,10,20****[command]

The division sign "/" is used below to indicate how many times it is run. This example is run every 5 minutes

*/5****[command]

You can also use "-" to indicate a range, as shown below: run once for every hour from 5 to 10 o'clock

05-10***[command]

There is also a special time keyword "@reboot" linux download tool, which is to run the scheduled task every time the server is restarted

@reboot[command]

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