php shell_exec touch redirect and adduser

Question

I am trying to ultimately use php\'s shell_exec function to create new Linux users. I am, however, running into problems even with the debugging. Here is my code

Answer 1

Please use my function found here.

Run the following code and tell us its output:

echo '
';
print_r(execute('pwd'));
print_r(execute('touch test.txt'));


Edit: If you want to make my script more OO oriented:

function execute_o($cmd,$in){
    $out=execute($cmd,$in);
    if($out['return']!=0)
        throw new Exception('Error '.$out['return'].': '.$out['stderr'].'.');
}