php - 多维数组上的 array_unshift

Question

我从 var_dump 得到了一个多维数组的结果:

array (size=6)
  'sambalpur.in.net' => 
    array (size=2)
      'classkey' => string 'indotnet' (length=8)
      'status' => string 'available' (length=9)
  'sambalpur.com' => 
    array (size=2)
      'classkey' => string 'domcno' (length=6)
      'status' => string 'regthroughothers' (length=16)
  'sambalpur.info' => 
    array (size=2)
      'classkey' => string 'dominfo' (length=7)
      'status' => string 'regthroughothers' (length=16)
  'sambalpur.net' => 
    array (size=2)
      'classkey' => string 'dotnet' (length=6)
      'status' => string 'regthroughothers' (length=16)
  'sambalpur.biz' => 
    array (size=2)
      'classkey' => string 'dombiz' (length=6)
      'status' => string 'available' (length=9)
  'sambalpur.in' => 
    array (size=2)
      'classkey' => string 'dotin' (length=5)
      'status' => string 'regthroughothers' (length=16)

现在假设我想将这个特定的数组移动到数组的开头:

'sambalpur.biz' => 
        array (size=2)
          'classkey' => string 'dombiz' (length=6)
          'status' => string 'available' (length=9)

我试过:

array_unshift($array,array('sambalpur.biz'));

但是我得到的是这样的:

array (size=7)
  0 => 
    array (size=1)
      0 => string 'sambalpur.biz' (length=13)
  'sambalpur.in.net' => 
    array (size=2)
      'classkey' => string 'indotnet' (length=8)
      'status' => string 'available' (length=9)
  'sambalpur.com' => 
    array (size=2)
      'classkey' => string 'domcno' (length=6)
      'status' => string 'regthroughothers' (length=16)
  'sambalpur.info' => 
    array (size=2)
      'classkey' => string 'dominfo' (length=7)
      'status' => string 'regthroughothers' (length=16)
  'sambalpur.net' => 
    array (size=2)
      'classkey' => string 'dotnet' (length=6)
      'status' => string 'regthroughothers' (length=16)
  'sambalpur.biz' => 
    array (size=2)
      'classkey' => string 'dombiz' (length=6)
      'status' => string 'available' (length=9)
  'sambalpur.in' => 
    array (size=2)
      'classkey' => string 'dotin' (length=5)
      'status' => string 'regthroughothers' (length=16)

移动数组的正确方法是什么？

Answer 1

我以为我以前做过，但找不到重复的:

$array = array_splice($array,
                      array_search('sambalpur.biz', array_keys($array)), 1) + $array;

• 使用 array_keys() 获取键的数字索引数组
• 使用 array_search() 在返回的数组中搜索 sambalpur.biz
• 使用返回的索引通过 array_splice() 剪切该元素
• 将其添加到现有数组

与 Don't Panic 相同:

$array = array_merge(array('sambalpur.biz' => $array['sambalpur.biz']), $array);

无需取消设置，因为插入顺序决定了哪个键会覆盖另一个键，因此这个键会覆盖前一个键。