php exec() returning 1 when running node js command

Question

I need to run node js command from my php file. I am using exec() to do this. Here is my script

<?php

$ret = exec("node -v", $out, $err);
echo print_r($out);
?>

Here I am getting return value 1. How to fix this?

Answer 1

http://php.net/manual/de/function.exec.php

Short summary:

• $ret contains last line of result
• $out array of result lines
• $err "any non-zero return value is an error" (referencing to this one https://stackoverflow.com/a/2230620/3278963)

So 1 means "Miscellaneous errors", have you tried running the command in the shell to see what happens?