PHP get string output of echo $SHELL

Question

How would you get the string output of the current shell in PHP?

This is what I tried

$output = shell_exec('echo $SHELL 2>&1');

but I'm getting empty output when I print it out.

$output should be a string that is something like /bin/bash

The code above produces no errors for me and runs just fine, returning the value I expect. I'd suggest simplifying the script include just this line along with the opening php tag and checking out the error log to see if something else failed in php which might cause nothing to be output. — Jonathan Kuhn
– Jonathan Kuhn, Commented Apr 28, 2017 at 22:21
@l'L'l the only (visible) anwser on that question says to add 2>&1 to the command, which OP already has. It is not a duplicate for that question. — Jonathan Kuhn
– Jonathan Kuhn, Commented Apr 28, 2017 at 22:22
@JonathanKuhn: The permissions were more of what might be worth focusing on... — l'L'l
– l'L'l, Commented Apr 28, 2017 at 22:34

sidyll · Accepted Answer · 2017-04-28 22:17:12Z

1

There is an specific function for getting environment variable values that you can use: getenv():

echo getenv('SHELL');

answered Apr 28, 2017 at 22:17

sidyll

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