array/iteration issue!!

hi. i have the following test multidiminsional array. i'm trying to figure out how to iterate through the array, to produce something like foo, physics, sss foo, physics, sffgg foo, english, sss foo, english, sffgg can't quite seem to get it right!! thoughts/comments... etc... thanks -------------------- $a=array("college"=> "foo", "dept"=>array("dept"=> "physics", "class"=>array("class1"=>"sss","class2"=>"sffgg") ), "dept"=>array("dept"=> "english", "class"=>array("class1"=>"sss","class2"=>"sffgg") ) );