Problem in executing Python script using PHP

Hello,

I am using the following function for executing python scripts on my server. The code works fine, unless the python script is importing something such as nltk library for example. I can't figure out why this happens. Can anyone help me out with this? I would really appreciate it.

Thanks

function execPython($cmd) {

	$output = "";

	$descriptor_spec = array(
		0 => array("pipe", "r"),
		1 => array("pipe", "w"),
		2 => array("file", "./error.log", "a")
	) ;

	$process = proc_open("python $cmd", $descriptor_spec, $pipes);

	if (is_resource($process)) {
 
		$output = nl2br(stream_get_contents($pipes[1]));

		fclose($pipes[1]);
		fclose($pipes[0]);

		$return = proc_close($process);
		if ($return != 0) $output = "Error";
	}
	else $output = "Error";

	return $output;
}

echo execPython("abc.py");

Code (markup):

 

have you tried to add the full path to the include?

 

So, I finally found the solution to the problem. It turned out that I have installed python modules in an alternative directory, so I just had to pass PYTHONPATH environment variable as well to the proc_open function. That did the work