[PHP-INSTALL] Executing a python script from within perl

[Anuj Bhatt]

Hi,


I'm new to PHP and just installed apache2 with php support. I'm trying
to execute a Python script (from within php), which does take a good
amount of time and am waiting for it to terminate so that I can process
the output and print that out in HTML.

The problem I'm having is that I can't get the PHP script to wait for
the Python file to terminate. If I try it with a simple Python script
say "print Hello, World!" it gets that. But anything that takes
substantially long time, it just returns. I've tried system("myfile.py",
$result) and $result results in a 1 and prints any subsequent prints in
the PHP file. I also tried exec, with no luck. I've read through
http://www.php.net/function.exec and the documentation presented in the
"See Also" section with other commands. I haven't got anywhere yet,
after much work. Any pointers, suggestions and fixes?


-anuj

[Daniel Brown]

Forwarded to the appropriate list (PHP General). Anuj: If you're
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Post by Anuj Bhatt
Hi,
I'm new to PHP and just installed apache2 with php support. I'm trying
to execute a Python script (from within php), which does take a good
amount of time and am waiting for it to terminate so that I can process
the output and print that out in HTML.
The problem I'm having is that I can't get the PHP script to wait for
the Python file to terminate. If I try it with a simple Python script
say "print Hello, World!" it gets that. But anything that takes
substantially long time, it just returns. I've tried system("myfile.py",
$result) and $result results in a 1 and prints any subsequent prints in
the PHP file. I also tried exec, with no luck. I've read through
http://www.php.net/function.exec and the documentation presented in the
"See Also" section with other commands. I haven't got anywhere yet,
after much work. Any pointers, suggestions and fixes?

Try this to see if your script is outputting any errors:

<?php
exec('/path/to/python your-script.py 2>&1',$ret);
print_r($ret);
?>

If that works, you may just need to adjust your timeout and set
ignore_user_abort(1) to allow the Python script to keep running. If
all else fails, and you're aware of the side-effects, go fork()
yourself. ;-P
--
</Daniel P. Brown>
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[Anuj Bhatt]

Post by Daniel Brown
<?php
exec('/path/to/python your-script.py 2>&1',$ret);
print_r($ret);
?>

This worked, was opening a file for which permission was denied. Python
didn't show me anything, when run on the prompt, however when I used the
above method, I did get the error. Thanks!


-anuj