如何检查多维数组是否包含相同的值? [英] How to check if multidimensional array contains same value?

问题描述

我有一个多维数组.我需要检查此数组中的任何值是否包含相同的值.如果执行，则执行.什么是更好的检查方法，还是最简单的TIA方法

I have a multidimensional array. I need to check if any value in this array has contain same value. If, then execute. What is the better way to check this, or the simplest way TIA

$array[] = array(5, 10, 15, 20, 25, 30);
$array[] = array(1, 2, 3, 4, 5, 6);
$array[] = array(2, 6, 8, 10, 12, 14);

Array
(
 [0] => Array
    (
        [0] => 5
        [1] => 10
        [2] => 15
        [3] => 20
        [4] => 25
        [5] => 30
   )

[1] => Array
    (
        [0] => 1
        [1] => 2
        [2] => 3
        [3] => 4
        [4] => 5
        [5] => 6
    ) 

 [2] => Array
     (
       [0] => 2
       [1] => 6
       [2] => 8
       [3] => 10
       [4] => 12
       [5] => 14
    )
)

推荐答案

如果我正确理解了您的问题，则您正在寻找一种方法来查找出现在多个内部数组中的值.这是使用一些内置的PHP数组方法的两种解决方案.

If I understood your question correctly, you are looking for a way of finding values that appears in more than one of the inner arrays..? Here are two solutions for that, using some built-in PHP array methods.

设置

• 使用代码:

  $array[] = array(5, 10, 15, 20, 25, 30);
  $array[] = array(1, 2, 3, 4, 5, 6);
  $array[] = array(2, 6, 8, 10, 12, 14, 5);
  
  // 5, 10, 15, 20, 25, 30, 1, 2, 3, 4, 5, 6, 2, 6, 8, 10, 12, 14, 5
  $array = call_user_func_array('array_merge', $array);
  

  方法A

  1. 在 $ array中获取一个唯一值的数组(已删除重复项)
  2. 通过比较该数组以获取删除的内容(=重复项)原始的 $ array
  3. 确保值在最终数组中仅出现 li>
  1. Get an array of unique values in $array (duplicates removed)
  2. Get what was removed (= the duplicates) by comparing that array to the original $array
  3. Make sure values appear only once in the final array

  代码:

  $duplicates =
      array_unique(
          array_diff_key(
              $array,
              array_unique($array)
          )
      );
  
  // $duplicates = 5, 2, 6, 10
  

  方法B

  1. 获取每个值出现多少次的列表在 $ array
  中
  2. 过滤器，该列表仅保留出现多次的值(=重复)
  3. 获取该列表的键(实际的$ array 值)
  1. Get a list of how many times each value appears in $array
  2. Filter that list keeping only values that appears more than once (= duplicates)
  3. Get the keys of that list (the actual $array values)

  代码:

  $duplicates =
      array_keys(
          array_filter(
              array_count_values($array),
              function ($count) {
                  return $count > 1;
              }
          )
      );
  
  // $duplicates = 5, 10, 2, 6
  

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