Form_Dropdown with Blank "Select One..." Option

[eluser]michalsn[/eluser]
Validation:

Code:

$this->form_validation->set_rules('is_active', 'Is active', 'required');

Static array sample:

Code:

$is_active_dropdown = array(
    NULL => 'Select one...',
    0    => 'No',
    1    => 'Yes'
);

Dynamic array sample:

Code:

$query = $this->db->get('is_active_dropdown');
$data[0] = 'Select one...';
foreach ($query->result_array() as $row)
{
    $data[$row['id']] = $row['name'];
}
return $data;

View:

Code:

<?php echo form_dropdown('is_active', $is_active_dropdown, set_value('is_active')); ?>