Running a Python script from PHP

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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.

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Running a Python script from PHP absolute: Questions

How to get an absolute file path in Python

3 answers

izb By izb

Given a path such as "mydir/myfile.txt", how do I find the file"s absolute path relative to the current working directory in Python? E.g. on Windows, I might end up with:

"C:/example/cwd/mydir/myfile.txt"
877

Answer #1

>>> import os
>>> os.path.abspath("mydir/myfile.txt")
"C:/example/cwd/mydir/myfile.txt"

Also works if it is already an absolute path:

>>> import os
>>> os.path.abspath("C:/example/cwd/mydir/myfile.txt")
"C:/example/cwd/mydir/myfile.txt"

Running a Python script from PHP absolute: Questions

How to check if a path is absolute path or relative path in a cross-platform way with Python?

3 answers

UNIX absolute path starts with "/", whereas Windows starts with alphabet "C:" or "". Does python have a standard function to check if a path is absolute or relative?

175

Answer #1

os.path.isabs returns True if the path is absolute, False if not. The documentation says it works in windows (I can confirm it works in Linux personally).

os.path.isabs(my_path)

Running a Python script from PHP absolute: Questions

How to join absolute and relative urls?

3 answers

I have two urls:

url1 = "http://127.0.0.1/test1/test2/test3/test5.xml"
url2 = "../../test4/test6.xml"

How can I get an absolute url for url2?

139

Answer #1

You should use urlparse.urljoin :

>>> import urlparse
>>> urlparse.urljoin(url1, url2)
"http://127.0.0.1/test1/test4/test6.xml"

With Python 3 (where urlparse is renamed to urllib.parse) you could use it as follow:

>>> import urllib.parse
>>> urllib.parse.urljoin(url1, url2)
"http://127.0.0.1/test1/test4/test6.xml"

log

Python"s equivalent of && (logical-and) in an if-statement

5 answers

delete By delete

Here"s my code:

def front_back(a, b):
  # +++your code here+++
  if len(a) % 2 == 0 && len(b) % 2 == 0:
    return a[:(len(a)/2)] + b[:(len(b)/2)] + a[(len(a)/2):] + b[(len(b)/2):] 
  else:
    #todo! Not yet done. :P
  return

I"m getting an error in the IF conditional.
What am I doing wrong?

934

Answer #1

You would want and instead of &&.

934

Answer #2

Python uses and and or conditionals.

i.e.

if foo == "abc" and bar == "bac" or zoo == "123":
  # do something

log

How do you get the logical xor of two variables in Python?

5 answers

Zach Hirsch By Zach Hirsch

How do you get the logical xor of two variables in Python?

For example, I have two variables that I expect to be strings. I want to test that only one of them contains a True value (is not None or the empty string):

str1 = raw_input("Enter string one:")
str2 = raw_input("Enter string two:")
if logical_xor(str1, str2):
    print "ok"
else:
    print "bad"

The ^ operator seems to be bitwise, and not defined on all objects:

>>> 1 ^ 1
0
>>> 2 ^ 1
3
>>> "abc" ^ ""
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for ^: "str" and "str"
794

Answer #1

If you"re already normalizing the inputs to booleans, then != is xor.

bool(a) != bool(b)

We hope this article has helped you to resolve the problem. Apart from Running a Python script from PHP, check other absolute-related topics.

Want to excel in Python? See our review of the best Python online courses 2022. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:



Julia Wu

Singapore | 2022-11-30

Simply put and clear. Thank you for sharing. Running a Python script from PHP and other issues with sin was always my weak point 😁. I am just not quite sure it is the best method

Javier Krasiko

New York | 2022-11-30

I was preparing for my coding interview, thanks for clarifying this - Running a Python script from PHP in Python is not the simplest one. Will get back tomorrow with feedback

Frank Galleotti

Moscow | 2022-11-30

Thanks for explaining! I was stuck with Running a Python script from PHP for some hours, finally got it done 🤗. Checked yesterday, it works!

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