phrases – WordPress emails error relating to the argument kind even when the sort is right

perform test_sort_terms_hierarchicaly( Array &$cats, Array &$into, $parentId = 0 )
          {
            if ( is_array( $cats ) ) {
                foreach ( $cats as $i => $cat ) {
                    if ( $cat -> mother or father == $parentId ) {
                        $into[ $cat -> term_id ] = $cat;
                        unset( $cats[ $i ] );
                    }
                }
            }

The above perform checks if the posts iterated have mother or father class set or not so {that a} corresponding checkbox might be constructed with the kid classes under the mother or father class. The primary argument is handed like so,

$phrases = get_terms( $select_taxonomy, array( 'hide_empty' => 0 ) );
$categoryHierarchy = array();
$this -> test_sort_terms_hierarchicaly( $phrases, $categoryHierarchy );

The return kind of get_terms() is an array of objects:

                       array(4) {
  [0]=>
  object(WP_Term)#1167 (10) {
    ["term_id"]=>
    int(3)
    ["name"]=>
    string(4) "CAT1"
    ["slug"]=>
    string(4) "cat1"
    ["term_group"]=>
    int(0)
    ["term_taxonomy_id"]=>
    int(3)
    ["taxonomy"]=>
    string(16) "wppg-product-cat"
    ["description"]=>
    string(0) ""
    ["parent"]=>
    int(6)
    ["count"]=>
    int(1)
    ["filter"]=>
    string(3) "uncooked"
  }
  [1]=>
  object(WP_Term)#1166 (10) {
    ["term_id"]=>
    int(4)
    ["name"]=>
    string(4) "CAT2"
    ["slug"]=>
    string(4) "cat2"
    ["term_group"]=>
    int(0)
    ["term_taxonomy_id"]=>
    int(4)
    ["taxonomy"]=>
    string(16) "wppg-product-cat"
    ["description"]=>
    string(0) ""
    ["parent"]=>
    int(6)
    ["count"]=>
    int(1)
    ["filter"]=>
    string(3) "uncooked"
  }
  [2]=>
  object(WP_Term)#1165 (10) {
    ["term_id"]=>
    int(5)
    ["name"]=>
    string(4) "CAT3"
    ["slug"]=>
    string(4) "cat3"
    ["term_group"]=>
    int(0)
    ["term_taxonomy_id"]=>
    int(5)
    ["taxonomy"]=>
    string(16) "wppg-product-cat"
    ["description"]=>
    string(0) ""
    ["parent"]=>
    int(6)
    ["count"]=>
    int(1)
    ["filter"]=>
    string(3) "uncooked"
  }
  [3]=>
  object(WP_Term)#1169 (10) {
    ["term_id"]=>
    int(6)
    ["name"]=>
    string(10) "PARENT_CAT"
    ["slug"]=>
    string(10) "parent_cat"
    ["term_group"]=>
    int(0)
    ["term_taxonomy_id"]=>
    int(6)
    ["taxonomy"]=>
    string(16) "wppg-product-cat"
    ["description"]=>
    string(0) ""
    ["parent"]=>
    int(0)
    ["count"]=>
    int(0)
    ["filter"]=>
    string(3) "uncooked"
  }
}

But nonetheless I am getting this e-mail even when the argument handed is an array. What am I doing mistaken right here?

Uncaught TypeError: Argument 1 handed to WPPG_Class::test_sort_terms_hierarchicaly() should be of the sort array, object given