PHP：分割的阵列到更深的阵列

Question

我有以下的数组：

Array(
    [0] => 0,0 
    [1] => 0,1 
    [2] => 0,2 
    [3] => 0,3 
    [4] => 1,0 
    [5] => 1,1 
    [6] => 1,2 
    [7] => 2,0 
    [8] => 2,1 
    [9] => 2,2 
    [10] => 2,3 
) 

我想将其分割成以下结构：

Array( 

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

即，在“X ，Y“值，X对应于新阵列中值”Y“的位置。我似乎无法理解逻辑，我第一次以这种方式使用'foreach'。

任何帮助将不胜感激指着我在正确的方向。

Answer 1

在您的示例输入和输出数组不太相符，但我猜你正在寻找这样的：

$array = array(…as above…); 
$newArray = array(); 

foreach ($array as $value) { 
    list($x, $y) = explode(',', $value); 
    $newArray[$x][] = $y; 
}