Question

我正在尝试使用array_filter函数从数组中删除数组元素。它工作正常，但始终有一个未被删除的元素。

使用一个简单的数组使用array_combine构造该数组，使用array_chunk构造另一个数组。

这是我的代码：

recursiveDelete()

如果出现错误，我不会在这里发问。但是返回没有错误。

制作$arr_a = array("AAA","","CCC",""); $arr_b = array("a1","b1","a2","b2","a3","b3","a4","b4"); $arr_c = array_chunk($arr_b,2); $c = array_combine($arr_a,$arr_c); $limpn_url = array_filter($c);时输出为： print_r($limpn_url);

*请注意Array ( [AAA] => Array ( [0] => a1 [1] => b1 ) [] => Array ( [0] => a4 [1] => b4 ) [CCC] => Array ( [0] => a3 [1] => b3 ) )不应存在。其他空元素已正确删除...

Answer 1

您可以使用一些数组函数来删除为空的键。

$arr_a = array("AAA","","CCC","");

$arr_b = array("a1","b1","a2","b2","a3","b3","a4","b4");

$arr_c = array_chunk($arr_b,2);

$c = array_combine($arr_a,$arr_c);

$limp= array_filter($c);

$filteredkeys = array_filter(array_keys($limp)); // here i remove the "" key

$filtered = array_intersect_key($limp, array_flip($filteredkeys)); // since $filterdkeys is values i need to flip it and intersect with $limp
var_dump($filtered);

输出：

array(2) {
  ["AAA"]=>
  array(2) {
    [0]=>
    string(2) "a1"
    [1]=>
    string(2) "b1"
  }
  ["CCC"]=>
  array(2) {
    [0]=>
    string(2) "a3"
    [1]=>
    string(2) "b3"
  }
}

https://3v4l.org/miNeW

无法从多维数组中删除空键

1 个答案: