PHP使用ruby返回输出（使用metainspector）

Question

I'm currently creating a php page which does a ssh call with a .rb (ruby) file.

rb file

require 'metainspector' 
page = MetaInspector.new("www.hln.be") 
puts page.image 

When creating a php file with the following code (php):

$cmd = "ruby facescrape.rb";
$last_line = system($cmd, $retval);
echo $last_line . '
echo $retval;

this only returns value 1.

However 2 things :

1. When running the same command in ssh, it will print the page.image correctly.
2. When i change the rb file and for instance set as last line

puts "test"

this value returns correctly with also print correctly with the aboven php code.

I don't get why printing the page.image works in ssh but won't work by using that php code. Also tried using exec() instead of system().

Thank you in advance!
Kind regards,

Kurt Colemonts