PHP Clean Multi Array

<?php
function cleanMultiArray($array) {
        if(!is_array($array)) {
                return -1;
        }
        foreach($array as $key=>$value) {
       
                if(is_array($value)) {
                        $array[$key] = cleanMultiArray($value);
                }
                else {
                        if( $value == "") {
                                unset($array[$key]);
                        }
                }
        }
        return $array;
}
?>