PHP数组与相同的键合并

Question

I try to merge 2 arrays where keys are same.

This is my array:

[username] => Array
    (
        [3805120] => 5
        [3805121] => 7
    )

[login] => Array
    (
        [3805120] => 9
        [3805121] => 11
    )

I need something like this:

[3805120] => Array
    (
        [0] => 5
        [1] => 9
    )

[3805121] => Array
    (
        [0] => 7
        [1] => 11
    )

Answer 1

Pretty simple. You need a nested loop that sets the subarray's keys as the new array's keys and use the [] in order the new values will be "added" to the array with an auto increase value [0,1,...n].

[username] => Array ( [3805120] => 5 [3805121] => 7 )

[login] => Array ( [3805120] => 9 [3805121] => 11 )

// $array is the original array
$newArray = array();

foreach($array as $key => $subarray){
  //key: username, login
  foreach($subarray as $j => $k){
    //j: 3805120, 3805121
    //k: 5,7,9,11
    $newArray[$j][] = $k;
    //1st round: $newArray[3805120][0] = 5, $newArray[3805121][0] = 7
    //2nd round: $newArray[3805120][1] = 9, $newArray[3805121][1] = 11 
  }
}

var_dump($newArray);

Output:

array(2) { [3805120]=> array(2) { [0]=> string(1) "5" [1]=> string(1) "9" } [3805121]=> array(2) { [0]=> string(1) "7" [1]=> string(2) "11" } }