What Is The Difference Between Running A Script From The Command Line And From Exec() With Php?

I'm trying to run a Python script using exec() from within PHP. My command works fine when I run it directly using a cmd window, but it produces an error when I run it from exec()

Solution 1:

You have to run nltk.download() and choose 'maxent_treebank_pos_tagger'. You must make a python script and in it put:

#!/usr/bin/pythonimport nltk
nltk.download('maxent_treebank_pos_tagger');

then run it from command line. It will install the data files for the POS tagges, which you don't have installed yet.

After you do this it should work.

Solution 2:

Your web server likely runs with other privileges than yourself. Possible problems include:

• Path/file permission: can the web server user access the files it needs?
• Different environment: are all necessary environment variables (PATH, Python-specific stuff, …) set?
• Configuration: are there per-user configurations for Python or the module?

Tip: execute set in both the command prompt and from the PHP process and check the differences.

Solution 3:

From the shell/terminal, you can use:

sudo python -m nltk.downloader maxent_treebank_pos_tagger

It will install maxent_treebank_pos_tagger (i.e. the standard treebank POS tagger in NLTK).