Python script won't exec from php when specifi

Question

Im trying to execute a Python script to get and set the parameter server in ROS. When I run any other simple python script that for example prints "Hello", I get back the value in PHP. But when I run this code:

 #!/usr/bin/env python
 import roslib
 import rospy
 import sys
 import re
 import string

 get = rospy.get_param("param")
 print get

I get an empty echo. However this code works fine in the terminal!

All I'm doing in PHP is:

 $output = exec("python path/script.py")
 echo $output;

I tried shell_exec, I tried with python in the command, and without. I also tried /usr/bin/python still it won't work for this specific code, but everything works for a simple print!

Answer 1

It turns out that Apache's user doesnt have the required environment variables. So you have to add the environment variables paths you need in Apache's.. You can set them out here