重組數組在php中

Question

我有下面的源數組，我試圖重組使用group_name給我下面的require輸出。

任何幫助或指針讚賞。 謝謝，路

來源：

Array 
(
[field_a] => Array 
    (
     [type] => text 
     [group_name] => 
    ) 

[field_b] => Array 
    (
     [type] => number_integer 
     [group_name] => group_other 
    ) 

[field_c] => Array 
    (
     [type] => text 
     [group_name] => 
    ) 

[field_d] => Array 
    (
     [type] => link 
     [group_name] => group_web_links 
    ) 

[field_e] => Array 
    (
     [type] => link 
     [group_name] => group_web_links 
    ) 

[field_f] => Array 
    (
     [type] => text 
     [group_name] => group_web_links 
    ) 

) 

輸出：

Array 
(
[group_other] => Array 
    (
     [field_b] => Array 
      (
       [type] => number_integer 
       [group_name] => group_other 
      ) 
    ) 

[group_web_links] => Array 
    (
     [field_d] => Array 
      (
       [type] => link 
       [group_name] => group_web_links 
      ) 

     [field_e] => Array 
      (
       [type] => link 
       [group_name] => group_web_links 
      ) 

     [field_f] => Array 
      (
       [type] => text 
       [group_name] => group_web_links 
      ) 
    ) 

[field_a] => Array 
    (
     [type] => text 
     [group_name] => 
    ) 

[field_c] => Array 
    (
     [type] => text 
     [group_name] => 
    ) 
) 

Answer 1

如果新的數組的鍵順序不是那麼重要：

$new_array = array(); 
foreach ($old_array as $key => $value) { 
    if (empty($value['group_name'])) $new_array[$key] = $value; 
    else { 
     if (!array_key_exists($value['group_name'], $new_array) $new_array[$value['group_name']] = array(); 
     $new_array[$value['group_name']][$key] = $value; 
    } 
} 

Answer 2

這可以通過完成簡單foreach循環：

$start_array; // The array you want to convert 
$end_array = array(); // The final array 
foreach ($start_array as $index => $value) { 
    if (empty($value["group_name"])) { 
     $end_array[$index] = $value; 
    } else { 
     $end_array[$value["group_name"]][$index] = $value; 
    } 
} 

Answer 3

事情是這樣的：

$array_dst = array(); 
foreach ($array_src as $group_key=>$group_data){ 
    $group_name = $group_data['group_name']; 
    if (empty($array_dst[$group_name])) 
     $array_dst[$group_name] = array(); 
    $array_dst[$group_name][$group_key] = $group_data; 
} 

Answer 4

$new_array = array(); 
foreach($old_array as $field_id => $field) { 
    if($field[ 'group_name' ] == '') { 
     $new_array[ $field_id ] = $field; 
    } else { 
     $new_array[ $field[ 'group_name' ] ][ $field_id ] = $field; 
    } 
} 

我想那些誰反對投票這個正在做，是因爲我不初始化$new_array[ $field[ 'group_name' ] ]。那麼，這在PHP中不是必需的，當您執行$new_array[ $field[ 'group_name' ] ][ $field_id ] = $field;時，它將自動使用空數組進行初始化。