Tableaux associatifs: comment se débarrasser des doublons?

Question

J'ai un tableau:

Array 
(
    [0] => Array 
     (
      [attribute_name] => Appliances 
      [attribute_value] => Washer 
     ) 

    [1] => Array 
     (
      [attribute_name] => Appliances 
      [attribute_value] => Dryer 
     ) 

    [2] => Array 
     (
      [attribute_name] => Appliances 
      [attribute_value] => Dishwasher 
     ) 

    [3] => Array 
     (
      [attribute_name] => Appliances 
      [attribute_value] => Microwave 
     ) 

    [4] => Array 
     (
      [attribute_name] => Console 
      [attribute_value] => Xbox360 
     ) 

    [5] => Array 
     (
      [attribute_name] => Console 
      [attribute_value] => PS3 
     ) 
) 

Je veux produire:

Array 
(
    [0] => Array 
     (
      [attribute_name] => Appliances 
      [attribute_value] => Washer, Dryer, Dishwasher, Microwave 
     ) 

    [1] => Array 
     (
      [attribute_name] => Console 
      [attribute_value] => Xbox360, PS3 
     ) 
) 

Comment cela est réalisé en PHP?

Voici mon code final basé sur la solution originale de @ andrewtweber:

http://codepad.org/E4WFnkbc

Answer 1

$new_arr = array(); 

foreach($arr as $data) { 
    if(!isset($new_arr[$data['attribute_name']])) { 
     $new_arr[$data['attribute_name']] = array(); 
    } 
    $new_arr[$data['attribute_name']][] = $data['attribute_value']; 
} 

Cela vous donnera

array('Appliances' => array('Washer', 'Dryer', 'Dishwasher')); 

http://codepad.org/m6l3je0H