在多維數組中計數值？

Question

我有一個大陣，我基本上需要計算不重複的號碼： example array

我在尋找類似

$result = array(
    'A3D5' => array('P2' => 1, 'P3' => 1, 'P4' => 1, 'total' => 3), 
    'AE5S' => array('P4' => 1, 'total' => 1) 
); 

最終的結果我已經試過foreaching通過，但不能似乎弄清楚如何將它們分類到另一個鍵，例如$zone = "P{$array['zone']}"; $result[$zone][$prestige]++，或者似乎有點不起作用或者僅僅是錯誤。

Answer 1

$array = array(
    "denizen" => array 
     (
      "prestige" => 2, 
      "zone" => "A3D5", 
      "scope_frag" => 765 
     ), 

    "생각" => array 
     (
      "prestige" => 4, 
      "zone" => "A3D5", 
      "scope_frag" => 135 
     ), 

    "Ryans" => array 
     (
      "prestige" => 3, 
      "zone" => "A3D5", 
      "scope_frag" => 78 
     ), 

    "지적인" => array 
     (
      "prestige" => 2, 
      "zone" => "AE5S", 
      "scope_frag" => 481 
     ) 
); 
foreach ($array as $group) { 
    $zones[$group["zone"]][] = $group["prestige"]; 
} 
foreach ($zones as $name => $zone) { 
    $total = count($zone); 
    foreach ($zone as $prestige) { 
     $result[$name]["P".$prestige] += 1; 
    } 
    ksort($result[$name]); 
    $result[$name]["total"] = $total; 
} 
echo "<pre>"; 
print_r($result); 
echo "</pre>";