Select Multiple selection menu in Admin controller

[N@D33M]

Hi,

 

I'm overriding attribute and values form at Admin area, I need multiple selection menu which is working fine now the thing is

array(
					'type' => 'select',
					'label' => $this->l('Disable the following services:'),
					'name' => 'attribute_disable[]',
					'required' => false,
					'size' => 25,
					'multiple' => true,
					'options' => array(
						'query' => Attribute::getAttributes($this->context->language->id),
						'id' => 'id_attribute',
						'name' => 'name',
						'selected' =>'selected',
						'default' => array(
							'value' => '',
							'label' => $this->l(' ')
						),
						
					),
					'desc' => $this->l(' Use CTRL+CLICK to select several, selected services will be disabled'),
				),

Now everything is working fine, I'm saving data in DB like: 11,21,23,34,35 for that "attribute_disable" but thing is how could I select the DB saved values in Admin panel controller?

I can get the attribute_disable = 11,21,23,34,35 in a string format but don't know how to check that element that is saved in DB to be selected once I go to edit page in admin area.

like:

if($attibute_disable  = $multiple_select_loop_value) //111,222,333
{
 <option value='111' selected='selected'>abc1 xyz</option>
<option value='222' selected='selected'>abc2 xyz</option>
<option value='333' selected='selected'>abc3 xyz</option>
}

I'm using PS 1.5.5 there's no documentation about that, please help as it's urgent.

 

Thanks,

Edited September 24, 2013 by N@D33M (see edit history)