PHP to execute a Ruby script and capture the JSON result

Question

I have to work with a Ruby script that is dependent on a Gem. When the script is executed a JSON object is returned.

I am successfully executing the script using the following code.

<?php

$ruby = 'ruby ruby/teams.rb';

$res = system($ruby);

var_dump(json_decode($res, true));

The following is an example response from ruby/teams.rb

{"status"=>"active", "teamId"=>"XPLFKS59PK" }

My problem is that this printed directly to the screen and is not capture in the variable $res. When using var_dump(json_decode($res, true)) I get null.

What I would like to be able to do is capture the JSON response in the $res variable so I can convert to an array and worth with the data.

Any ideas if this is possible?

You should use exec instead of system. system returns only the last line of the executed command which in your case might be empty. Use exec and get all the output in an array. — Panther
– Panther, Commented Oct 4, 2017 at 14:00
Also realised I am not being returned a json array but a Ruby hash! Quick .to_json on the Ruby side sorted that. — Joe Ainsworth
– Joe Ainsworth, Commented Oct 4, 2017 at 14:23

Marcin Orlowski · Accepted Answer · 2017-10-04 14:00:19Z

1

My problem is that this printed directly to the screen and is not capture in the variable $res.

Most likely it sends its output to stderr instead stdout, so you need to redirect the streams yourself like this:

$ruby = 'ruby ruby/teams.rb 2>&1';

Here more about stream redirection: http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-3.html

Or, use exec() instead of system()

answered Oct 4, 2017 at 14:00

Marcin Orlowski

75.7k11 gold badges128 silver badges152 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Panther · Accepted Answer · 2017-10-04 14:05:52Z

0

system only returns the last line of the commands output. In your case, i would use exec. Your code would look something like below

$ruby = 'ruby ruby/teams.rb';
exec($ruby, $res);
var_dump(json_decode(implode("", $res), true));

answered Oct 4, 2017 at 14:05

Panther

9,5183 gold badges26 silver badges37 bronze badges

Collectives™ on Stack Overflow

PHP to execute a Ruby script and capture the JSON result

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related