Running venv Python script from PHP

Question

I am running many python scripts from PHP. My php script template as below:

<?php
setlocale(LC_ALL, "en_US.utf8");
header("Content-Type: application/json");
header("Access-Control-Allow-Origin: *");

$command = escapeshellcmd("/usr/bin/python2.7 /path/to/script");
$args = escapeshellarg($_GET["title"]). " " . 
escapeshellarg($_GET["user"]);
$output = shell_exec($command . " " . $args);
echo $output;

But now I need to run some python scripts which are in virtual environment.

I tried to replace /usr/bin/python2.7 with ./www/python/venv/bin/python3, but it does not work.

So how to run it in PHP?

Please explain what you mean by "but it does not work". – Valentin Lorentz Dec 31 '18 at 10:35 — Valentin Lorentz, Dec 31 '18 at 10:35
It means that Python script does not run. – Yethrosh Dec 31 '18 at 10:39 — Yethrosh, Dec 31 '18 at 10:39
Do you get an error? If yes, which one? – Valentin Lorentz Jan 01 '19 at 11:32 — Valentin Lorentz, Jan 01 '19 at 11:32

Blcknx · Answer 1 · 2019-01-02T20:13:14.487

2

To really run venv you would need to do three steps in the shell:

Change into project root.
source venv/bin/activate
run python path/to/script

Prerequisite you already have prepared a virtual env for the project.

You could combine this three steps into a bash script and call this script from PHP.

edited Jan 02 '19 at 20:13

answered Jan 01 '19 at 08:55

Blcknx

1,921
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Yes, this method works but it does not take $args variable. Any suggestion, please? – Yethrosh Jan 02 '19 at 09:59
I am sure you can access the $args variable in the bash script you call. However bash scripts are not my realm. Should be easy to look that up. Probably this is the answer: https://stackoverflow.com/questions/2740906/how-to-access-command-line-arguments-inside-a-function-using-bash – Blcknx Jan 02 '19 at 20:09
Figure out which part does not work! Can't you receive the argument inside the script? Does it work on the shell? Then, does it work from PHP? – Blcknx Jan 07 '19 at 09:31
Yes it perfectly works on shell, but does not in php. It seems that $args variable does not work. – Yethrosh Jan 09 '19 at 08:58

PrakashG · Answer 2 · 2019-01-03T06:40:15.540

1

Ideally You should use APIs, that is the best practice. But if you don't have API available you can use pipe.
That can be used like this function: exec_command($command) where,
$command = $command . " " . $args
Below is the code:

<?php
setlocale(LC_ALL, "en_US.utf8");
header("Content-Type: application/json");
header("Access-Control-Allow-Origin: *");

$command = escapeshellcmd("/usr/bin/python2.7 /path/to/script");
$args = escapeshellarg($_GET["title"]). " " . 
escapeshellarg($_GET["user"]);

$command = $command . " " . $args;

$output = "";
$hd = popen($command, "r");
while(!feof($hd))
{
  $output .= fread($hd, 4096);
}
pclose($hd);

echo $output;

?>

edited Jan 03 '19 at 06:40

answered Dec 31 '18 at 11:00

PrakashG

1,642
5
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Thanks for your reply. I am trying this but it throws . – Yethrosh Jan 02 '19 at 09:35
@Yethrosh, Please remove the function and use function's code directly. And I'm sure enough that this is not because of this function exec_command() as I daily use this. – PrakashG Jan 02 '19 at 10:37
Could you please update the above code as you said? :) – Yethrosh Jan 03 '19 at 03:09
@Yethrosh, Please try the updated solution, and if it helps you then accept the answer. – PrakashG Jan 03 '19 at 11:20
No, it does not goes in virtual environment. – Yethrosh Jan 07 '19 at 04:27
@Yethrosh, Please post the exact error message you're getting when you run above code, so that I can change accordingly. – PrakashG Jan 07 '19 at 06:40
It throws error of importing python library which i installed only in virtual environment. And now I want to call python script (of virtual environment) using php as described in question. :) – Yethrosh Jan 09 '19 at 08:57

Running venv Python script from PHP

2 Answers2