Why is foreach not working?

[eluser]Kraig[/eluser]
Do you have any idea why this foreach would not work? If I just echo $this->variable it displays the last index only..however I want to display it all, but I get an error 'Message: Invalid argument supplied for foreach()'

Code:

$var = $this->variable; //$this->variable is a global array and it does work
foreach($var as $yup){
  echo $yup;
}