Execute python script from PHP with parameters?

Question

I cannot figure out, how to pass parameters to PHP exec function that I use to run scripts via website.

After some googling I ended up with this:

exec("nohup sudo python /home/pi/Python/RGB_Controller/write_color.py ".$HEX." &", $status);

print_r($status);

This script simply takes the parameter and writes it into .txt file (if there is parameter). When I run it via bash it works as expected. But when I run it with exec the file is not changed.

Running scripts without parameters works fine. This also does not work:

exec("nohup sudo python /home/pi/Python/RGB_Controller/write_color.py test &", $status);

EDIT: Dammit. So the problem was elsewhere. In my python script that writes the file I had only relative filepath for my file. So it worked probably many times when I tried. Only the data.txt file was being created in the server root directory and thus never updating the one in my Python folder.

Answer 1

Can you try something like the below code snippet.

private function runCom(){
    $command = 'nohup sudo python /home/pi/Python/RGB_Controller/write_color.py' .$HEX.'& > /dev/null 2>&1 & echo $!';
    exec($command ,$op);
    $this->pid = (int)$op[0];
}

Its like you build your command with necessary arguments as a string.

Then exec($command ,$op). Please check and let me know.