从php multidimensional获取两个唯一的随机值

Question

缺乏知识我将是一个多维PHP，让我困惑继续我的项目，任何人都可以帮我PHP多维？所以，我有一些多维PHP，然后我希望从具有特定条件的随机数组中获得两个唯一值。有关详细信息，请访问：

$array = Array(
 "LABEL1" => Array(
              'value 1',
              'value 2',
              'value 3'
             ),

 "LABEL2" => Array(
              'value 1'
             ),

 "LABEL3" => Array(
               'value 1',
               'value 2'
             ),

 "LABEL n" => Array(
               'value n'
             )
 )

 $output = random($array);
 print_r($output);

 //output a $output

 Array(
  [LABEL unique n] => Array(
               [0] => 'value 1'
              )
  [LABEL unique n] => Array(
               [1] => 'value 2'
               [n] => 'value n'
              )
  )

 //or

 Array(
  [LABEL1] => Array(
               [0] => 'value 1' // always index [0] from LABEL n
              )
  [LABEL3] => Array(
               [1] => 'value 2' //get index > [0] from LABEL n
              )
  )

  //or

  Array(
  [LABEL2] => Array(
               [0] => 'value 1' // always index [0] from LABEL n
              )
  [LABEL1] => Array(
               [1] => 'value 2' //get index > [0] from LABEL n
               [2] => 'value 3' //get index > [0] from LABEL n
              )
  )

  //or

  Array(
  [LABEL2] => Array(
               [0] => 'value 1' // always index [0] from LABEL n
              )
  [LABEL3] => Array(
               [1] => 'value 2' //get index > [0] from LABEL n
              )
  )

这不可能吗？

Answer 1

给出您的示例输入，此代码中的问题是：

当“第二随机目标子阵列”仅具有一个元素并且该元素的键与“第一个随机目标子阵列”相同时，则第二个子阵列在结果数组中将为空。执行演示链接以显示此问题。

代码：（Demo）

$array=[
    "LABEL1"=>['value 1','value 2','value 3'],
    "LABEL2"=>['value 1'],
    "LABEL3"=>['value 1','value 2'],
    "LABEL9"=>['value n']
];

$rand_keys=array_rand($array,2);  // generate an array of two random keys from $array
foreach($rand_keys as $i=>$key){
    if($i==0){
        $subarray=$array[$key];
        $column=array_rand($subarray);  // column to be excluded from 2nd iteration's subarray
        $result[$key][$column]=$subarray[$column];  // store the randomly selected value
    }else{
        $diff=array_diff_key($array[$key],[$column=>'']);  // store all elements that are not from the same column as first subarray
        $result[$key]=$diff; // when subarrays are LABEL2 & LABEL9 or LABEL9 & LABEL2, then the second subarray will be empty
    }
}
var_export($result);

可能的输出：

array (
  'LABEL1' => 
  array (
    1 => 'value 2',
  ),
  'LABEL3' => 
  array (
    0 => 'value 1',
  ),
)

可能的输出：

array (
  'LABEL1' => 
  array (
    0 => 'value 1',
  ),
  'LABEL2' => 
  array (
  ),
)