Run shell commands with PHP?

Question

Occasionally my media server goes down and I'm wondering if it's possible to start it remotely using php to check the port and if it's not running invoke cron (or some other way) to run a shell command. Is this possible because this is not a strong area for me. Here's the process I use with PuTTy.

1. login to shell
2. cd to source/red5/dist
3. screen
4. ./red5.sh
5. CTRL-A then D to detach
6. logout

Answer 1

Simplest thing is to write a shell script. And then login to remote console via PHP .

• shell_exec : execute a shell command and returns the output as string.
• exec : just executes an external program

Answer 2

一个简单的方法来实现您想要的是在屏幕上运行此：

while /bin/true ; do ./red5.sh ; done

Answer 3

如果您可以编写满足您需求的shell脚本，则PHP可以为您提供exec() ， system()和passthru() 。

Answer 4

PHP actually has a special operator for executing shell commands, the backtick :

`cd source/red5/dist`

will go to the specified directory. (But I don't know much about shell, so I can't implement you the whole thing.)

If you need much control over the execution (I don't know whether you need here) use proc_open .

Answer 5

you can use corn job on php and put all command on .sh file and run like this

59 11 * * 1,2,3,4,5 root command file.sh?token

something like this ,it will be save

Answer 6

There is more than one good answer here, but you should opt for executing the init script for red5 instead of the .sh or .bat. There are pre-made init scripts here: http://code.google.com/p/bigbluebutton/downloads/detail?name=red5&can=2&q= and here: http://www.videowhisper.com/forum.php?ftid=48&t=init-file-red5-linux-installations-red5-linux-init.d-chkconfig