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
From: http://blog.chinaunix.net/u3/111961/showart_2359262.html
Cron is a Linux scheduled execution tool that can run jobs without human intervention.
1. About crontab
In ubuntu server 9.10, cron is installed and started by default. The/etc/crontab
Introduction
Cron is a Linux timed execution tool that can run jobs without human intervention.Under Ubuntu Server, Cron is installed and started by default, and if it is not started, it is set and started (chkconfig\sysv-rc-conf).The following can
IntroducedCron is a Linux timed execution tool that can run jobs without human intervention.Under Ubuntu Server, Cron is installed and started by default, and if it is not started, it is set and started (chkconfig\sysv-rc-conf).The following can be
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:
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
PHP uses cron to synchronize articles to Sina and Netease Weibo 1. Tw2other? Is a PHP applet that supports synchronizing data from twitter to digusinazu?follow59911 Douban broadcast fresh fruit broadcast to the Internet, and NetEase Weibo? Author:
PHP uses cron to synchronize articles to Sina and Netease Weibo 1. Tw2other? A php applet that supports twitter synchronization to digu/sina/zuosa/follow5/9911/Douban broadcast/fresh fruit broadcast/human/Renren/NetEase Weibo? Author: cluries
Allow crontab to automatically schedule rows of PHP
To use the crontab auto-dynamic PHP program, you can do this:
Method 11. Add the following in the first line of the PHP program:
#! /Usr/local/PHP/bin/PHP-Q
For example:
Plain textPHP:
#!
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:
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