variable referencing inside foreach

1st code:
<?php
foreach($fields as &$field){
    $fieldValues = $this->controller->DomainFormFieldValue->find('all', array('conditions' => array('domain_form_field_id' => $field['DomainFormField']['id'])));
    foreach($fieldValues as $fieldValue){
        $field['DomainFormFieldValue'][] = $fieldValue['DomainFormFieldValue'];
    }
}
unset($field);
?>

2nd code:
<?php
foreach($fields as &$field){
    $fieldValues = $this->controller->DomainFormFieldValue->find('all', array('conditions' => array('domain_form_field_id' => $field['DomainFormField']['id'])));
    $values = array();
    foreach($fieldValues as $fieldValue){
        $values[] = $fieldValue['DomainFormFieldValue'];
    }
    $field['DomainFormFieldValue'] = $values;
}
unset($field);
?>


1st code result:
[DomainFormFieldValue] => Array
                (
                    [0] => Array
                        (
                            [id] => 3
                            [name] => Australian Company Number (ACN)
                            [value] => 1
                            [selected] => yes
                            [domain_form_field_id] => 20
                        )

                    [1] => Array
                        (
                            [id] => 4
                            [name] => Australian Business Number (ABN)
                            [value] => 2
                            [selected] =>
                            [domain_form_field_id] => 20
                        )

                    [2] => Array
                        (
                            [id] => 5
                            [name] => Other
                            [value] => 3
                            [selected] =>
                            [domain_form_field_id] => 20
                        )

         [3] => Array
                        (
                            [id] => 3
                            [name] => Australian Company Number (ACN)
                            [value] => 1
                            [selected] => yes
                            [domain_form_field_id] => 20
                        )

                    [4] => Array
                        (
                            [id] => 4
                            [name] => Australian Business Number (ABN)
                            [value] => 2
                            [selected] =>
                            [domain_form_field_id] => 20
                        )

                    [5] => Array
                        (
                            [id] => 5
                            [name] => Other
                            [value] => 3
                            [selected] =>
                            [domain_form_field_id] => 20
                        )

                )




2nd code result:

[DomainFormFieldValue] => Array
                (
                    [0] => Array
                        (
                            [id] => 3
                            [name] => Australian Company Number (ACN)
                            [value] => 1
                            [selected] => yes
                            [domain_form_field_id] => 20
                        )

                    [1] => Array
                        (
                            [id] => 4
                            [name] => Australian Business Number (ABN)
                            [value] => 2
                            [selected] =>
                            [domain_form_field_id] => 20
                        )

                    [2] => Array
                        (
                            [id] => 5
                            [name] => Other
                            [value] => 3
                            [selected] =>
                            [domain_form_field_id] => 20
                        )

                )