if variable is array, e.g.: 

var $secondvar =
       array(
           'stuff' =>
               array(
                   6,
                   17,
                   'armadillo'
               ),
           testing => anotherconstant
        );

then auto-generated phpdoc tag could be array because we can say it's array in contrary of other variables where you can't always say what's the type.

 /**
  * @var array 
  */

it's <type> at the moment
 /**
  * @var <type> 
  */