Executing a Python file from Codeigniter

Question

I have some trouble to execute a Python file from a Codeigniter controller's function.

~/application/controllers/Lights.php :

header("Access-Control-Allow-Origin: *");
class Lights extends CI_Controller {
    public function __construct() {
        parent::__construct ();
        $this->load->helper ( array ('url', 'form') );
    }
    public function turnOn() {
        system('sudo python test.py > /dev/null 2>/dev/null &');
    }
}

but when I try to execute a system call, like :

system("sudo gpio mode 15 out");

this works perfectly.

Pedro Lobito · Accepted Answer · 2016-05-08 16:27:16Z

3

Provide the full path to python binary and script, i.e.:

system('/full/path/to/python /full/path/to/test.py > /dev/null 2>/dev/null &');

If the python binary is already on the PATH of your apache user (apache/www-user), you may ignore the full path.

edited May 8, 2016 at 16:27

answered May 7, 2016 at 20:39

Pedro Lobito

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3 Comments

BenYacine Over a year ago

Thank you, that was the solution :)

halfer Over a year ago

The only additional remark I'd make here is that some PHP environments don't mirror the PATH configured in a standard user account. They'll run under something like www-user, which will have a much more minimal path configured.

Pedro Lobito Over a year ago

Based on my experience, python is already on the PATH of the apache user, although, I've updated my answer mentioning that.

Tanakorn Lueangkajonvit · Accepted Answer · 2016-05-08 15:59:55Z

-1

yes I has a problem like that and Thank you for Pedro Lobito answer. There need a full path to call python file from CI from the root folder.

such as

system('sudo -u root -S python /var/www/4led/turnon1.py');

*sudo -u root -S is a command for using root permission with no root password required :D

answered May 8, 2016 at 15:59

Tanakorn Lueangkajonvit

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