Calling specific version of python from PHP

Question

I'm setting up a big system relying on python 2.7 being run through php. The call is always something like:

exec('python test.py');

However no matter what I do PHP keeps using python 2.4 for executing my files. Because of the size of the system I can't change in the programming, but will have to make 'python' point directly to python2.7.

By searching around I have reached the conclusion that I should change the php env.

echo getenv("PYTHONPATH"); // NOTHING
echo getenv("PATH"); // /bin:/usr/bin

I can do so through putenv (for example: putenv("PATH=/usr/bin/python2.7:".$_ENV["PATH"]), but php keeps running python 2.4 no matter what I change it to.

Hope somebody out there got a simple solution :)

IanGSY · Accepted Answer · 2013-03-10 18:31:29Z

3

Could you not just do this instead:

exec('/usr/bin/python2.7/python test.py');

answered Mar 10, 2013 at 18:31

IanGSY

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3 Comments

Bornakke Over a year ago

Python is exec from around 100 different files so I will have to change the system.

MattDMo Over a year ago

@Bornakke It should be pretty straightforward to build a shell script to search and replace your expressions, optionally asking for your approval before changing them.

Bornakke Over a year ago

Can't do. The project is part of a big git project and is already running on other servers with the current python call. What I'm looking for is a way to change PHP enviromental path.

san4o · Accepted Answer · 2013-03-10 19:53:23Z

1

another option, you can set path to interpreter in 1st line of script test.py

#!/usr/local/bin/python2.7

but you need make test.py executable

chmod +x path_to_file/test.py

and run from php as

exec('path_to_file/test.py');

P.S. be attentive administrators sometimes disable exec function on servers for safety. disable_functions="popen,exec,system,passthru,proc_open,shell_exec" ....

answered Mar 10, 2013 at 19:53

san4o

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4 Comments

Bornakke Over a year ago

Python is exec from around 100 different files so I will have to change the system which can't be done since the project is part of a big git project and is already running on other servers with the current python call. What I'm looking for is a way to change PHP enviromental path

san4o Over a year ago

i'm not sure, but i read about option python.append_path for php.ini php.net/manual/en/ini.list.php or find and replace your exec(...) command like proposed

Bornakke Over a year ago

The python.append_path sounds like a good solution, but can i change that without changing the php.ini, and if yes -how?

san4o Over a year ago

if you using apache and mod_python installed you can set PythonPath in htaccess look here , or google such solution for nginx =)) although personally I would not install extension just for this thing, find and replace 10-20 strings of you code easiest solution

Valery Viktorovsky · Accepted Answer · 2013-03-10 18:34:30Z

0

If you can't use full path, try an alias:

alias python='/usr/bin/python2.7'
python --version
Python 2.7.2

answered Mar 10, 2013 at 18:34

Valery Viktorovsky

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3 Comments

Bornakke Over a year ago

Alias works in the terminal and when I run python here I get the right version. But Alias doesn't change the way PHP make use of python.

Valery Viktorovsky Over a year ago

Did you try to set alias for user (nobody or www-data) who runs web server?

Bornakke Over a year ago

yep. But it is already the same user. But PHP wouldn't use the alias, since the env. path is defined inside php.ini.

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