PHP結合了兩個多維數組

Question

我想使用array_combine結合兩個多維數組，但不知怎的，沒有正確地做。

這裏是陣列1：

Array(
    [Nov 18, 2011] => Array(
     [C] => 107705.5792 
     [I] => 44561.52 
    ) 
    [Nov 22, 2011] => Array(
     [C] => -8992.8352 
    ) 
) 

這裏是數組2：

Array(
    [Nov 18, 2011] => Array(
     [C] => 3 
     [I] => 1 
    ) 
    [Nov 22, 2011] => Array(
     [C] => 2 
    ) 
) 

這是我在array_combine的嘗試，這是行不通的：

$array1 = ($arr1); 
$array2 = ($arr2); 
$result = array_combine($arr1, $arr2); 
echo '<pre>'; 
print_r($result); 
echo '</pre>'; 

我在做什麼錯誤？這是我正在尋找的結果：

Array(
    [Nov 18, 2011] => Array(
     [3] => 107705.5792 
     [1] => 44561.52 
    ) 
    [Nov 22, 2011] => Array(
     [2] => -8992.8352 
    ) 
) 

感謝您的幫助。

• 編輯 -

我發現，如果我改用array_merge_recursive，這是我的，我得到的結果。不是我一直在尋找，但接近：

Array(
    [Nov 18, 2011] => Array(
     [C] => Array(
      [0] => 3 
      [1] => 107705.5792 
     ) 
     [I] => Array(
      [0] => 1 
      [1] => 44561.52 
     ) 
    ) 
    [Nov 22, 2011] => Array(
     [C] => Array(
      [0] => 2 
      [1] => -8992.8352 
     ) 
    ) 
) 

• 進一步編輯 -

這裏是我曾經試圖實施以下建議之一的方式，然而這不工作我。什麼是錯的？：

function cust_array_merge(array &$array1, array $array2){ 
    // loop through main array 
    foreach ($array1 as $key => $val) { 
     // check if $array2 has the same index 
     if (array_key_exists($key, $array2)) { 
      // reset $array1's indexes to $array2's values 
      foreach ($array2[$key] as $subKey => $subVal) { 
       if (array_key_exists($subKey, $array1[$key])) { 
        $tempVal = $array1[$key][$subKey]; 
        unset($array1[$key][$subKey]); 
        $array1[$key][$subVal] = $tempVal;}}}}} 

$merged = cust_array_merge($arr_cats_per_bill_date, $arr_cvat); 
echo '<pre>'; 
    print_r($merged); 
echo '</pre>'; 

Answer 1

array_merge_recursive讓你非常接近（你的「鑰匙」是葉數組索引1，你的價值是在索引0）。因此，分兩步進行：首先獲取合併數組，然後擺弄分支以使其正確。

// This is a callback for array_map() which should have some more generic uses. 
// array(array('k', 'v'), ...) -> array('k' => 'v', ...) 
function flatten_branches($branches) { 
    $newleaves = array(); 
    foreach ($branches as $leaf) { 
     $newleaves[$leaf[0]] = $leaf[1]; 
    } 
    return $newleaves; 
} 

function merge_flatten_branches($karray, $varray) { 
    //$karray has the key-leaves, and $varray has the value-leaves 
    $m1 = array_merge_recursive($karray, $varray); 
    return array_map('flatten_branches', $m1); 
} 

$merged = merge_flatten_branches($array2, $array1); 
print_r($merged); 

只是爲了好玩，這裏有兩種方法。這兩個都比merge_flatten_branches慢一些，但說明了一些有用的數組概念。 （在其他更功能性的語言比PHP，這些可能是首選）。

function merge_flatten_branches_reduce($karray, $varray) { 
    //$karray has the key-leaves, and $varray has the value-leaves 
    $m1 = array_merge_recursive($karray, $varray); 
    return array_map('flatten_branches_reduce', $m1); 
} 

function merge_flatten_branches_add($karray, $varray) { 
    //$karray has the key-leaves, and $varray has the value-leaves 
    $m1 = array_merge_recursive($karray, $varray); 
    return array_map('flatten_branches_add', $m1); 
} 

// The functions below are callbacks for the two above. 

function array_add($a1, $a2) { 
    return $a1+$a2; 
} 

function flatten_leaf($leaf) { 
    return array($leaf[0] => $leaf[1]); 
} 

function flatten_branches_add($branches) { 
    $leaves = array_map('flatten_leaf', ($branches)); 
    $finalleaves = array(); 
    foreach ($leaves as $leaf) { 
     $finalleaves += $leaf; 
    } 
    return $finalleaves; 
} 


function flatten_branches_reduce($branches) { 
    $l = array_map('flatten_leaf', ($branches)); 
    return array_reduce($l, 'array_add', array()); 
} 

Answer 2

你要找的結果看起來真的很適合我。也就是說，我不知道任何內置的PHP數組函數，它們可以做那。但是，我確實爲您編寫了自定義函數。 警告：這是非常適合這個場合，因此可能不是很可可重複使用。

function cust_array_merge(array $array1, array $array2) 
{ 
    $merged = array(); 
    // loop through main array 
    foreach ($array1 as $key => $val) { 
     // check if $array2 has the same index 
     if (array_key_exists($key, $array2)) { 
      // reset $array1's indexes to $array2's values 
      foreach ($array2[$key] as $subKey => $subVal) { 
       if (array_key_exists($subKey, $array1[$key])) { 
        $tempVal = $array1[$key][$subKey]; 
        unset($array1[$key][$subKey]); 
        $array1[$key][$subVal] = $tempVal; 
       } 
      } 
      $merged = $array1; 
     } 
    } 
    return $merged; 
}