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Running python code from php

I have a python script that php needs to run:

     <?php
     $command = escapeshellcmd('/home/Desktop/test.py');
     $output = shell_exec($command);
     echo $output;

     ?>

The python script output is binary, but I am getting the following error in the log: Can't access X Display, is $ DISPLAY set?

The PHP code works fine from the terminal, but no luck when I try to run it from the browser. Any idea what's going on? Ideally, I don't want to change my program. I want to know how you can fix the X Display error. Is there a way to check if $ DISPLAY is set correctly? (I am working with Ubuntu)

I tried this: pidof X && echo "yup X server is running" on my terminal and it says yup x server is running!

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3 answers


Add the following text to the first line of your Python script:

#!/usr/bin/python


Without this, the kernel does not know which interpreter is running your script from, and can try to run it with /usr/bin/import

(because that word probably appears on the first line of the script). The utility import

requires access to the X11 screen (it is basically a screenshot utility) so you get this error.

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For a python file, you may need to open a window to run. You say you saw it running in the terminal? What is test.py? Is this propitiation? If you try to use this as a command in your PHP: (and not 100% that shell escaping will not remove this, so it may need to be commented out)

python -c \'print \"Test\"\'


and see if you return the output text. If it is a python problem, not PHP, and the test.py file can instantiate what is needed to set $ DISPLAY var. PHP does not set $ DISPLAY var as these are shell commands, not GUI commands.

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try it popen 

$command = "/usr/bin/python /home/Desktop/test.py";
$handle = popen($command, "r");

"r" for reading

$read = fread($handle, 10);

10 is the size of the output you want to take,

echo $read ;

hope this helps,

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