I'd like to use foreach to loop though an array list and add an element to each array.

$tom = array('aa','bb','cc');
$sally = array('xx','yy','zz');

$myArrays = array('tom','sally');

 foreach($myArrays as $arrayName) {
     ${$arrayName}[] = 'newElement';
 }

Is the use of ${$arrayName}[] the best way to do this? Is there another option rather than using curly braces? It currently works but I'm just wondering if there is a better alternative.

Thanks