如何从PHP脚本设置cron作业? [英] how to set cron job from php script?
问题描述
10 * * * * root / usr / bin / php / var / www /脚本路径/email.php
在email.php中,我有以下代码
#!/ usr / bin / php
<?php
邮件( examplemail@mail.com, Cron成功的公共HTML!,来自mycron.php的Hello World!);
?>
我每10分钟收到一次邮件。
但是我需要知道有什么方法可以从php调用cron作业(从php调用cron)
我通过冲浪获得了一些想法,但是我无法弄清楚完成工作的确切方法。
这是我以前使用php来添加工作的代码
exec('echo -e crontab -e \n2 * * * * / usr / bin / php /var/www/SCRIPT/crontest1.php');
它对我不起作用。谁能指导我如何从php调用或添加cron。所以tat我可以通过执行php文件&发送邮件能够改变PHP文件本身的时间间隔。
这将添加一个每天上午9:30运行的脚本。
exec('echo -e"`crontab -l`\n30 9 * * * / path / to / script'| | crontab-');
如果从Web服务器运行此脚本,可能会遇到权限问题。为了解决这个问题,我建议采用另一种方法。
这里是一种可能的解决方案。创建需要运行的脚本列表。您可以将其保存在文本文件或数据库中。创建一个脚本来读取此列表,并每分钟或每5分钟运行一次(使用cronjob)。您的脚本必须足够聪明,以决定何时运行脚本列表以及何时仅退出脚本。
您可以这样做。.
其他链接:
i am new to cron job . i studied some basics about cron job . i can able to call php using cron tab. By using following command in /etc/crontab
10 * * * * root /usr/bin/php /var/www/PATH TO SCRIPT/email.php
In email.php i have following code
#!/usr/bin/php
<?php
mail ("examplemail@mail.com", "Cron Successful Public HTML!","Hello World from mycron.php!");
?>
For every 10mins i am getting mail. But i need to know is there any way to call cron job from php ( invoke cron from php) i get some idea by surfing but i am not able to figure out the exact way to do my job . Here is code which i used to add job by using php
exec('echo -e "crontab -e \n2 * * * * /usr/bin/php /var/www/PATH TO THE SCRIPT/crontest1.php" ');
Its not working for me. can anyone please guide me how to call or add cron from php. so tat i can send mail by executing php file & can able change time interval in php file itself.
From How can I set cron job through PHP script by Nick Clark:
This will add a script that runs every day at 9:30am.
exec('echo -e "`crontab -l`\n30 9 * * * /path/to/script" | crontab -');
You may run into problems with permissions if you are running this script from a web server. To get around this, I would suggest a different approach.
Here is one possible solution. Create a list of scripts that need to be run. You can save this in a text file or in a database. Create a script to read this list and run it every minute or every 5 minutes (using a cronjob). Your script will need to be smart enough to decide when to run the list of scripts and when to simply exit.
You can do like this..
Other links:
Install a cron job with a php script
How to invoke cron job from php script?
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