Asked  7 Months ago    Answers:  5   Viewed   87 times

I'm trying to run a Python script from PHP using the following command:

exec('/usr/bin/python2.7 /srv/http/assets/py/switch.py arg1 arg2');

However, PHP simply doesn't produce any output. Error reporting is set to E_ALL and display_errors is on.

Here's what I've tried:

  • I used python2, /usr/bin/python2 and python2.7 instead of /usr/bin/python2.7
  • I also used a relative path instead of an absolute path which didn't change anything either.
  • I tried using the commands exec, shell_exec, system.

However, if I run

if (exec('echo TEST') == 'TEST')
{
    echo 'exec works!';
}

it works perfectly fine while shutdown now doesn't do anything.

PHP has the permissions to access and execute the file.

EDIT: Thanks to Alejandro, I was able to fix the problem. If you have the same problem, don't forget that your webserver probably/hopefully doesn't run as root. Try logging in as your webserver's user or a user with similar permissions and try to run the commands yourself.

 Answers

59

Tested on Ubuntu Server 10.04. I hope it helps you also on Arch Linux.

In PHP use shell_exec function:

Execute command via shell and return the complete output as a string.

It returns the output from the executed command or NULL if an error occurred or the command produces no output.

<?php 

$command = escapeshellcmd('/usr/custom/test.py');
$output = shell_exec($command);
echo $output;

?>

In Python file test.py, verify this text in first line: (see shebang explain):

#!/usr/bin/env python

Also Python file must have correct privileges (execution for user www-data / apache if PHP script runs in browser or curl) and/or must be "executable". Also all commands into .py file must have correct privileges:

Taken from php manual:

Just a quick reminder for those trying to use shell_exec on a unix-type platform and can't seem to get it to work. PHP executes as the web user on the system (generally www for Apache), so you need to make sure that the web user has rights to whatever files or directories that you are trying to use in the shell_exec command. Other wise, it won't appear to be doing anything.

To make executable a file on unix-type platforms:

chmod +x myscript.py
Wednesday, March 31, 2021
 
kinske
answered 7 Months ago
12

First of all, what is the version of PHP?

If other .php scripts work except for phpMyAdmin, the is pretty safe to assume something is wrong with phpMyAdmin installation. (either with the files or the Virtual Host)


Troubleshoot:

  1. Can you run another script in phpMyAdmin directory? Try with a file containing phpinfo(); If it does not work then the problem is in your apache configuration.

  2. If the above is true, then the parser is not recognising phpMyAdmin/index.php as a php file, for some reason. Try reinstalling phpMyAdmin.


Thoughts:

Remove AddType application/x-httpd-php .php. You should not need it.

In PHP 5.4 magic_quotes_gpc was removed. If you're running PHP5, remove that line.

As of PHP 4.0.3, track_vars is always turned on, so remove it also.

As of PHP 4.2.0, register_globals this directive defaults to off. In PHP5.3 register_globals is deprecated, as of PHP5.4 register_globals was removed. SO if running PHP > 4.2.0 remove that line.

Saturday, May 29, 2021
 
vuliad
answered 5 Months ago
74

I resolve the problem. I changed the system_exec command with exec, put the json object in quotes.

this is my code now:

$json = str_replace(""", "\"",  json_encode($jsonArray));
$script = "C:UsersmadalinaDesktopworkspacescript.py";
$blander_path = "C:Program FilesBlender FoundationBlender";
$output = exec("cd $blander_path && blender -b -P $script -- "$json"", $data);
print_r($data);
Saturday, May 29, 2021
 
viper
answered 5 Months ago
77
for f in *.csv; do
  python playlist.py "$f" "${f%.csv}list.txt"
done

Will that do the trick? This will put foo.csv in foolist.txt and abc.csv in abclist.txt.

Or do you want them all in the same file?

Thursday, August 5, 2021
 
kat_indo
answered 3 Months ago
21

The equivalent of apt-get update in Arch Linux is pacman -Syy.

pacman -Syu is equivalent to apt-get update && apt-get upgrade.

Might as well make this complete if it stays...

pacman -S <package> is apt-get install <package>

Saturday, September 11, 2021
 
Iber
answered 2 Months ago
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