通過單體陣列排列多維陣列

Question

multidim。陣列的樣子：

$arr = array(
    array(
    'id' => 'first', 
    'name' => 'John', 
    'age' => 17, 
), 

    array(
    'id' => 'second', 
    'name' => 'Mary', 
    'age' => 26, 
), 

    array(
    'id' => 'third', 
    'name' => 'Eve', 
    'age' => 21, 
), 

); 

，並決定自己如何$arr排序看起來像數組：

$sort_by = array('third', 'first', 'second');

所以我想是基於其id領域的第一個數組中的元素進行排序和第二個陣列。

在這種情況下，第一陣列應該是：

$arr = array(
    array(
    'id' => 'third', 
    'name' => 'Eve', 
    'age' => 21, 
), 

    array(
    'id' => 'first', 
    'name' => 'John', 
    'age' => 17, 
), 

    array(
    'id' => 'second', 
    'name' => 'Mary', 
    'age' => 26, 
), 


); 

Answer 1

$sortedArray = array(); 
foreach($sort_by as $sort){ 
    foreach($arr as $val){ 
    if($val['id'] === $sort){ 
     $sortedArray[] = $val; 
    } 
    } 
} 

被盜從：Sort Array Subkey Based on Another Array's Order

Answer 2

function sort_by_1d($item_1, $item_2) 
{ 
    $sort_by = array('third', 'first', 'second'); 
    $item_1_i = array_search($item_1['id'], $sort_by); 
    $item_2_i = array_search($item_2['id'], $sort_by); 
    return $item_1_i - $item_2_i; 
} 

usort($arr, 'sort_by_1d');