Merge two arrays by key but mantain the key of the first in PHP, array_combine fails

I am trying to combine two arrays but mantaining the key of the first.

I've this data:

$days = array(
    1 => array("name" => "Monday"),
    2 => array("name" => "Tuesday"),
    3 => ...
    30 => array("name" => "Sunday"),
);

And another one with the clicks:

$clics = array(
    2 => array("clicks" => 4),
    10 => array("clicks" => 2),
);

My desired array is:

$final = array(
    1 => array("name" => "Monday"),
    2 => array("name" => "Tuesday", "clicks" => 4),
    3 => ... 
    4 =>
    5 => 
    ...
    10 => array("name" => "Tuesday", "clicks" => 2),
    ..
    30 => array("name" => "Sunday"),
);

In the second array if there is no click the index开发者_运维知识库 doesn't exists. I have tried array_combine but needs to have the same key and array_merge fails to.

What option I have?

Thank you in advance

Take a look at the array_merge_recursive function on PHP.net. Also, check out the comments there to seek if one of those functions are providing the desired array (I.E. comment #104145 and comment #102379

Also, please note that with the use of a foreach, you are sure to have the desired array eventually. Are there any specific reasons why you don't want, or cannot use foreach?

I can't see any way to do this with out a loop, but with a loop it's easy:

function merge_your_arrays ($days, $clicks) {
  foreach ($days as $k => $v) {
    if (isset($clicks[$k])) {
      $days[$k] = array_merge($days[$k],$clicks[$k]);
    }
  }
  return $days;
}

$final = merge_your_arrays($days, $clicks);