在PHP

Question

創建從循環關聯多維數組我怎樣才能創建像從數據庫結果集的使用循環在PHP以下的數組：

Array 
(
    [T] => Array 
     (
      [0] => Array 
       (
        [id] => 1 
        [name] => Timer 
       ) 

      [1] => Array 
       (
        [id] => 2 
        [name] => Tub 
       ) 

     ) 

    [P] => Array 
     (
      [0] => Array 
       (
        [id] => 3 
        [name] => Paper 
       ) 

      [1] => Array 
       (
        [id] => 4 
        [name] => Puppy 
       ) 

     ) 

) 

你會發現，在數組鍵是一個字母，它取自結果集中的'name'值。循環將是這樣的：

while($result = $db->fetch($query) { 

    $key = $result['name']{0}; 

    // your answer :-) 

} 

Answer 1

我覺得這樣的事情應該這樣做：

$sql = 'SELECT id, name FROM table'; 
$result = mysql_query($sql); 
$answer = array(); 
while($row = mysql_fetch_assoc($result)) 
{ 
    $answer[ strtoupper($row['name'][0]) ][] = $row; 
} 
mysql_free_result($result); 
var_dump($answer); 

OR，更具體的（如果你的查詢不僅僅是id和name返回多列）：

while($row = mysql_fetch_assoc($result)) 
{ 
    $answer[ strtoupper($row['name'][0]) ][] = array(
     'id' => $row['id'], 
     'name' => $row['name'] 
    ); 
} 

Answer 2

$indexArray = array(); // Array from Example 
while($result = $db->fetch($query) { 
    $key = $result['name']{0}; 
    if(!isset($indexArray[$key])) { 
     $indexArray[$key] = array(); 
    } 
    array_push($indexArray[$key], $result); 
} 

Answer 3

$results = array(); 
while($result = $db->fetch($query)) { 
    $key = strtoupper($result['name'][0]); 
    if(!isset($results[$key])) 
    $results[$key] = array(); 
    $results[$key][] = $result; 
}