错误。为什么“变量未定义”在array_map？

php arrays array-map

2022-08-30 09:49:49

我正在我的php应用程序中使用函数。我像这样定义了array_map函数。array_map

$ratingID =  $this->db->insert_id();

    $rated_item_array = array_map(function ($a) {
        return $a + array('RatingID' => $ratingID);
    }, $rated_item_array);

Php通知来了

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: ratingID

当我打印.i 正确打印值，因此定义了$ratingID。为什么它在功能上是未定义的？我的是$ratingIDarray_map$rated_item_array

Array
(
    [0] => Array
        (
            [RatingFactorPreferenceID] => 1,
            [PreferenceID] => 45,
            [RatedValue] => 1,
            [CreatedOn] => 1326790338,
            [CreatedBy] => 25
        )

    [1] => Array
        (
            [RatingFactorPreferenceID] => 2,
            [PreferenceID] => 45,
            [RatedValue] => 1,
            [CreatedOn] => 1326790338,
            [CreatedBy] => 25
        )

    [2] => Array
        (
            [RatingFactorPreferenceID] => 3,
            [PreferenceID] => 45,
            [RatedValue] => 1,
            [CreatedOn] => 1326790338,
            [CreatedBy] => 25
        )
)

答案 1

$rated_item_array = array_map(
  function ($a) use ($ratingID){ 
    return $a + array('RatingID' => $ratingID ); 
  }, 
  $rated_item_array
);

答案 2