Question

嘿伙计们，我希望能快一点！

我有一个数组

array(
(int) 30 => array(
    'score' => (int) 30,
    'max_score' => (int) 40,
    'username' => 'joeappleton',
    'user_id' => '1'
),
(int) 34 => array(
    'score' => (int) 34,
    'max_score' => (int) 40,
    'username' => 'joeappleton',
    'user_id' => '1'
),
(int) 36 => array(
    'score' => (int) 36,
    'max_score' => (int) 40,
    'username' => 'joeappleton',
    'user_id' => '1'
)

）

我需要通过引用数组键按降序排序：

array( 
    36 => array('score' => 36, 'max_score' => 40, 'username' => 'joeappleton', 'user_id' => '1'),
    34 => array('score' => 34, 'max_score' => 40, 'username' => 'joeappleton', 'user_id' => '1'),
    30 => array('score' => 36, 'max_score' => 40, 'username' => 'joeappleton', 'user_id' => '1')
);

我尝试了krsort（）但没有快乐，似乎回归了一个布尔。有任何想法吗？

Answer 1

好的问题是krsort（）使用pass by reference。它对原始数组进行排序并返回一个bool。

我改变了

return krsort($returnArray); //this returned true

到

krsort($returnArray); return $returnArray;

Answer 2

我们可以使用array_multisort，它可以提供你想要的相同结果!!!

<?php 
$people = array( 
(int) 30 => array(
'score' => (int) 30,
'max_score' => (int) 40,
'username' => 'joeappleton',
'user_id' => '1'
),
(int) 34 => array(
'score' => (int) 34,
'max_score' => (int) 40,
'username' => 'joeappleton',
'user_id' => '1'
),
(int) 36 => array(
'score' => (int) 36,
'max_score' => (int) 40,
'username' => 'joeappleton',
'user_id' => '1'
)); 
//var_dump($people); 

$sortArray = array(); 

foreach($people as $person){ 
foreach($person as $key=>$value){ 
    if(!isset($sortArray[$key])){ 
        $sortArray[$key] = array(); 
    } 
    $sortArray[$key][] = $value; 
} 
} 

$orderby = "score"; //change this to whatever key you want from the array 

array_multisort($sortArray[$orderby],SORT_DESC,$people); 

//var_dump($people); 
print_r($people);
?>

将关联数组索引排序为相反的顺序

2 个答案: