Question

I am making an online judge. It is a school project. I am using CodeIgniter. I am also using xampp. Now I need to give a command to the command prompt from my controller. I have tried using the system function and the exec function, but it still isn’t working. My code was

    exec('my command');
    system('my command');

These are not working. Am I using then correctly or is there a problem with the argument?

Answer 1

First and as already mentioned: Use mkdir for creating directories.

Second: What is md supposed to do? The command here is mkdir, too. And thirdly, considering exec, take a look at the exec function:

string exec ( string $command [, array &$output [, int &$return_var ]] )

So what you can do (if you want to stick to exec for whatever reason or for future use cases):

exec("your command", $output, $return_var);
echo "returned with " . $return_var;
print_r($output);

This will tell you what went wrong with your command execution.