Use PHP exec to execute Minecraft command
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I'm working on creating my own little Website to manage a Minecraft server as fun project. Now what I would need to accomplish is being able to send commands to the screen in which the server is running.
My approach to this was the following:
<?php
if (isset($_POST['startbutton']))
{
exec('sudo screen -S 23971 -X stuff "say hello^M"');
}
?>
<form method="post">
<button type="submit" name="startbutton">Test</button>
</form>
Now that command line works just fine when i execute it in the terminal itself, but as soon as i try to run it over the Website nothing happens. If i just try to execute
if (isset($_POST['startbutton']))
{
echo exec('whoami');
}
?>
it works just fine as well. I don't know what I am doing wrong.
Answer
Solution:
i'm really not sure about it, but try:
<?php
if (isset($_POST['startbutton']))
{
exec('sudo screen -S 23971 -X stuff "say hello^M"');
exec('YOUR SUDO PSW');
}
?>
<form method="post" action="YOUR PHP PAGE LIKE server.php">
<button type="submit" name="startbutton">Test</button>
</form>
let me know if it works
Answer
Solution:
Seems like you are trying to execute a command that needs superuser permissions. In most setups PHP runs under the webserver user and it does not have those permissions. Also you should keep in mind that giving superuser permissions to PHP is a security risk.
My suggestion would be to have a dedicated service, responsible for executing those shell commands. You could then call that service from your PHP script without needing sudo.
Check these for details:
Answer
Solution:
First of all: Thank you all for your support. I was doing a bit of further research and found a solution for my problem:
I created a new user which I then gave the ownership of /var/www. I then changed the apache2 user from www-data to the new user. Now i just needed to start the screen with the minecraft server as the new user so i can access this screen out of php and I was able to get it to work without having to give any user full root privileges or anything.
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Additional Information:
Link To Answer People are also looking for solutions of the problem: the process class relies on proc_open, which is not available on your php installation.
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