從MySQL建立一個多維數組與php

Question

我想從一個MySQL結果集中形成一個特定的多維數組。

我想它看起來就像這樣：

array(
'product_name' => 'prod_1', 
'categories' => array(1,2,3,4) 
); 

的分貝結果返回一個數組，看起來像這樣

Array 
(
[0] => Array 
    (
     [id] => 1 
     [product_name] => prod_1 
    ) 

[1] => Array 
    (
     [id] => 2 
     [product_name] => prod_1 
    ) 

[2] => Array 
    (
     [id] => 3 
     [product_name] => prod_1 
    ) 

[3] => Array 
    (
     [id] => 4 
     [product_name] => prod_1 
    ) 

正如你可以看到，我想組產品名稱並將其放入另一個陣列中

有沒有人有關於如何操作的提示？

Answer 1

$yourarray = array(array('id'=>1, 'product_name' => 'prod_1'), array('id'=>2, 'product_name' => 'prod_2'),array('id'=>3, 'product_name' => 'prod_3')); 
$multiarray = array(); 

for($i=0; $i<count($yourarray);$i++){ 
    $multiarray['product_name'][] = $yourarray[$i]['product_name']; 
    $multiarray['product_id'][] = $yourarray[$i]['id']; 
} 

print_r($yourarray); //original array 
print_r($multiarray); //gives you multi array 

這是什麼類似的東西？

您的原始數組：

Array 
(
    [0] => Array 
     (
      [id] => 1 
      [product_name] => prod_1 
     ) 

    [1] => Array 
     (
      [id] => 2 
      [product_name] => prod_2 
     ) 

    [2] => Array 
     (
      [id] => 3 
      [product_name] => prod_3 
     ) 

) 

結果將打印：

Array 
(
    [product_name] => Array 
     (
      [0] => prod_1 
      [1] => prod_2 
      [2] => prod_3 
     ) 

    [product_id] => Array 
     (
      [0] => 1 
      [1] => 2 
      [2] => 3 
     ) 
) 

Answer 2

你有沒有嘗試GROUP_CONCAT。它是這樣的：

SELECT name, GROUP_CONCAT(name) AS friends FROM friendships GROUP BY name; 

對這裏的細節來看看：http://forums.mysql.com/read.php?10,287931,287936#msg-287936

Answer 3

$yourarray = array(array('id'=>1, 'product_name' => 'prod_1'), array('id'=>2, 'product_name' => 'prod_1'), array('id'=>3, 'product_name' => 'prod_1'),array('id'=>4, 'product_name' => 'prod_1')); 

$multiarray = array(); 
foreach ($yourarray as $value) { 
    if(!isset($multiarray['product_name'])) { 
     $multiarray['product_name'] = $value['product_name']; 
    }  
    $multiarray['categories'][] = $value['id']; 
} 
print_r($multiarray);