Question

ANYBODY知道如何对多维数组进行排序吗？！我一直试图这样做几个小时，没有成功。我正在尝试按“升序”排序数组“$ page”，因为这是在导航栏中显示的位置。任何帮助将非常感激！已经尝试过文档中的大多数示例，但似乎没有任何效果。

Array
(
[0] => Array
    (
        [position] => 0
        [text] => Home
        [url] => ./
        [navigation] => true
    )

[1] => Array
    (
        [position] => 0
        [text] => 404
        [url] => ./?p=404
        [navigation] => false
    )

[2] => Array
    (
        [position] => 0
        [text] => 403
        [url] => ./?p=403
        [navigation] => false
    )

[3] => Array
    (
        [position] => 1
        [text] => Posts
        [url] => ./?p=posts
        [navigation] => true
    )

[4] => Array
    (
        [position] => 3
        [text] => Users
        [url] => ./?p=users
        [navigation] => true
    )

[5] => Array
    (
        [position] => 1
        [text] => Logout
        [url] => ./?p=logout
        [navigation] => false
    )

[6] => Array
    (
        [position] => 2
        [text] => Banner
        [url] => ./?p=banner
        [navigation] => true
    )

[7] => Array
    (
        [position] => 5
        [text] => Login
        [url] => ./?p=login
        [navigation] => false
    )

)

请不要告诉我搜索，因为我有，但没有任何工作！当我在本地测试它时，其中一个确实工作，但我的服务器抛出了一个错误，所以我不得不找到一个替代方案。

Answer 1

使用usort。

function cmp($a, $b)
{
    if ($a['position'] == $b['position']) {
        return 0;
    }
    return ($a['position'] < $b['position']) ? -1 : 1;
}


usort($page, "cmp");

Answer 2

您可以在此处试用以下代码：sandbox

<强>代码

function intComparator($key) {
    return function ($a, $b) use ($key) {
        if ($a[$key] == $b[$key]) return 0;
        return $a[$key] > $b[$key] ? 1 : -1;
    };
}

$items = Array (
  Array (
    'position'   => 0,
    'text'       => 'Home',
    'url'        => './',
    'navigation' => True
  ),
  Array (
    'position'   => 0,
    'text'       => '404',
    'url'        => './?p=404',
    'navigation' => False
  ),
  Array (
    'position'   => 0,
    'text'       => '403',
    'url'        => './?p=403',
    'navigation' => False
  ),
  Array (
    'position'   => 1,
    'text'       => 'Posts',
    'url'        => './?p=posts',
    'navigation' => True
  ),
  Array (
    'position'   => 3,
    'text'       => 'Users',
    'url'        => './?p=users',
    'navigation' => True
  ),
  Array (
    'position'   => 1,
    'text'       => 'Logout',
    'url'        => './?p=logout',
    'navigation' => False
  ),
  Array (
    'position'   => 2,
    'text'       => 'Banner',
    'url'        => './?p=banner',
    'navigation' => True
  ),
  Array (
    'position'   => 5,
    'text'       => 'Login',
    'url'        => './?p=login',
    'navigation' => False
  )
);

usort($items, intComparator('position'));

for ($i = 0; $i < count($items); $i++) {  
  echo "######## Item $i ########\n";
  $item = $items[$i];          
  foreach($item as $key => $value) {
    printf("%-12s=> %s\n", $key, $value);
  }
}

<强>输出

######## Item 0 ########
position    => 0
text        => Home
url         => ./
navigation  => 1
######## Item 1 ########
position    => 0
text        => 403
url         => ./?p=403
navigation  => 
######## Item 2 ########
position    => 0
text        => 404
url         => ./?p=404
navigation  => 
######## Item 3 ########
position    => 1
text        => Logout
url         => ./?p=logout
navigation  => 
######## Item 4 ########
position    => 1
text        => Posts
url         => ./?p=posts
navigation  => 1
######## Item 5 ########
position    => 2
text        => Banner
url         => ./?p=banner
navigation  => 1
######## Item 6 ########
position    => 3
text        => Users
url         => ./?p=users
navigation  => 1
######## Item 7 ########
position    => 5
text        => Login
url         => ./?p=login
navigation  =>

如何对多维数组进行排序？

2 个答案: