dongmiao260399 2016-11-09 11:27
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PHP - 在多维数组中搜索

i'm in a lot of brain-pain, please advise. I have the following situation:

  • i have the next multidimensional array:

    $numbers = array (
        "one_digit" => array (1,2,3,4,5),
        "two_digits" => array (20,21,22,23,24,25),
        "three_digits" => array (301,302,303,304,304),
        "mixed_digits" => array (9,29,309,1)
    );
    
  • i need a way to search in the $numbers array for the following:

    -- search if number 20 is in any $numbers array and echo where it is found ex. $find1 = m_array_search("20", $numbers); echo "i've found the searched value in ".$find1." subarray of $numbers"; result: "i've found the searched value in two_digits subarray of $numbers"

    -- search if number 1 is in any $numbers array and echo where it is found ex. $find2 = m_array_search("1", $numbers); echo "i've found the searched value in ".$find2." subarray of $numbers"; result: "i've found the searched value in two_digits,mixed_digits subarray of $numbers"

thus function must be able to spot presence in one or many "subarrays". sorry if i've missued the term "subarray"

THANK YOU!!!

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3条回答 默认 最新

  • dtk31564 2016-11-09 11:47
    关注

    You can try this with array_search() in a loop -

    $numbers = array (
        "one_digit" => array (1,2,3,4,5),
        "two_digits" => array (20,21,22,23,24,25),
        "three_digits" => array (301,302,303,304,304),
        "mixed_digits" => array (9,29,309,1)
    );
    
    function search_value($array, $value)
    {
      $result = array();
      foreach($array as $key => $sub) {
        // check if element present in sub array
        if(array_search($value, $sub) !== false) {
          // store the key
          $result[] = $key;
        }
      }
      return $result;
    }
    
    var_dump(search_value($numbers, 1));
    var_dump(search_value($numbers, 5));
    

    Output

    array(2) {
      [0]=>
      string(9) "one_digit"
      [1]=>
      string(12) "mixed_digits"
    }
    array(1) {
      [0]=>
      string(9) "one_digit"
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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