PHP: python exec command

Question

I'm testing with PHP and Python, I`m trying print a text.

test.py:

import sys

print "x => " + sys.argv[1] + " y => " + sys.argv[2]

When I do:

sudo python test.py 5 9

The output is:

x => 5 y => 9

But when I do this in PHP:

<?php
exec("sudo python /home/pi/python/test.py 6 3");
?>

It shows nothing in the console. Not an error.

I have also tried system() or shell_exec but its not working.

How can this working?

Answer 1

I think the problem is that whatever user your PHP/WebServer is running on, does not have access to sudo, nor /home/pi. All in all, I wouldn't use sudo like this and rather set proper permissions for the user that PHP/WebServer is running on to execute said python script.

To solve it:

Put test.py in webroot ( /var/www usually) and remove sudo from your php script:

<?php
exec("python /var/www/test.py 6 3");
?>

You might also need to provide full path to python binary, like this:

<?php
exec("/usr/bin/python /var/www/test.py 6 3");
?>

To find out where python binary really is stored, you can use command which like this:

which python
/usr/bin/python

Answer 2

Try

<?php
exec("sudo python /home/pi/python/test.py 6 3 2>&1");
?>

Answer 3

The exec() function returns the last line of the executed command (see documentation ). In order to see it on the console, you need to output it:

echo exec("sudo python /home/pi/python/test.py 6 3");

If you want to see the full output of your executed command, have a look at passthru() .