Jak zobrazit ceny - algoritmus

<?
$nazvy_barva;
$nazvy_cena;
?>

<?
$cenik=array(
            4100 => array('modra'),
            4990 => array('cervena','medova'),
            4790 => array('růžova','fialova')
            );
?>

  $colors = array ("barva modra", "barva cervena", "barva ruzova", "barva fialova", "barva medova"); 
  $money = array ("4100", "4990", "4790", "4790", "4990");            
  
  asort($money);
  $old_value = $money[0];
  
  foreach($money as $key => $value){
      if ($old_value != $value) echo $colors[$key].", "; 
      else echo $colors[$key]." = ".$value."<br />";
      $old_value = $value;
  }

$nameColors[1]= array ( 'name' => 'Modrá');
$nameColors[2]= array ( 'name' => 'Červená');    

 
$colors[]= array ('idName' => 1,  'price' => 4100 );
$colors[]= array ('idName' => 1,  'price' => 5600 ); 
$colors[]= array ('idName' => 2,  'price' => 4100 );  
 

  $colorProduct = [];
  
  foreach ($colors  as $c) {  
  if(!array_key_exists($c['price'], $colorProduct))   {  
   $colorProduct[$c['price']] =  array(
      'name'=> $nameColors[$c['idName']]['name'], 
      'price'=> $c['price'] );   
   }   else {   
$colorProduct[$c['price']] =  array(
     'name'=> $colorProduct[$c['price']]['name'].', '.$nameColors[$c['idName']]['name'], 
     'price'=> $c['price']);    
 }  
  
  }
 
 var_dump($colorProduct);
  
  
  /**
   *array (size=2)
  4100 => 
    array (size=2)
      'name' => string 'Modrá, Červená' (length=17)
      'price' => int 4100
  5600 => 
    array (size=2)
      'name' => string 'Modrá' (length=6)
      'price' => int 5600  
   **/