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Cannot Run Rscript from PHP but it runs perfect from terminal

rated 0 times [ 0] [ 0] / answers: 1 / hits: 1678 / 2 Years ago, sun, october 16, 2022, 9:20:39

I'm new to Ubuntu
I'm trying to execute an Rscript in PHP using exec. However it doesnt run.
When I run it from the terminal it executes perfectly.

This is the code I run from commandline:

/usr/lib/R/bin/Rscript /home/xin/Documents/ClassificationApp/ClassificationAllInOne.R "http://localhost/categorisation/public/classification/data/1423242832.json"

It works perfectly.

From searching around i can deduce it is a permissions issue as PHP/apache runs as www-data and Rscript is root.

I've tried a number of ammendments to the Sudoers file none of which worked:-

User_Alias WWW_USER = www-data

Cmnd_Alias WWW_COMMANDS =  /usr/lib/R/bin/Rscript, /home/xin/Documents/Classifi$



WWW_USER ALL = (ALL) NOPASSWD: WWW_COMMANDS

This hasn't worked. I've spent a day messing around with various combinations. It's driving me mad.

Any inspiration would be most welcome

M

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mance

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answered 2 Years ago ncharm · Accepted Answer

When debugging PHP code that executes external scripts (R, bash, ...) the easiest thing to do is to install php-cli

sudo apt-get install php-google-api-php-client

php-cli means "PHP Command Line Interface". As the name suggests, it's is a way of using PHP from the terminal.

then execute the script using /usr/bin/php -q <?php YourPHPCodeHere; ?>

Alternatively, create a file that contains the PHP code:

#!/usr/bin/php -q

<?php

echo "Hello world...";

?>

then chmod +x szNameOfFile

and then just type ./szNameOfFile

If you don't want to type the full path to your PHP script, just create a bin directory in your home directory and copy all your script files there (this directory automatically gets added to the path after you exit and re-open your terminal)