PHP : get values of same key from another array

Question

I have two different arrays

Array 1:

$result = array(
    "2018-08-30" => 8
    "2018-08-31" => 2
    "2018-09-04" => 4
    "2018-09-20" => 1
    "2018-09-24" => 1
    "2018-09-27" => 2
  );

and

Array 2

$dateRanges = array(
  "2018-08-28" => 0
  "2018-08-29" => 1
  "2018-08-30" => 2
  "2018-08-31" => 3
  "2018-09-01" => 4
  "2018-09-02" => 5
  "2018-09-03" => 6
  "2018-09-04" => 7
  "2018-09-05" => 8
  "2018-09-06" => 9
  "2018-09-07" => 10
  "2018-09-08" => 11
  "2018-09-09" => 12
  "2018-09-10" => 13
  "2018-09-11" => 14
  "2018-09-12" => 15
  "2018-09-13" => 16
  "2018-09-14" => 17
  "2018-09-15" => 18
  "2018-09-16" => 19
  "2018-09-17" => 20
  "2018-09-18" => 21
  "2018-09-19" => 22
  "2018-09-20" => 23
  "2018-09-21" => 24
  "2018-09-22" => 25
  "2018-09-23" => 26
  "2018-09-24" => 27
  "2018-09-25" => 28
  "2018-09-26" => 29
  "2018-09-27" => 30
);

I have used array_flip for second array($dateRanges), so please dont get confused the the values give in the sequence.

I want to assign the value of the date from Array1 to Array2;

expected result :

$dateRanges = array(
  "2018-08-28" => 0
  "2018-08-29" => 0
  "2018-08-30" => 8
  "2018-08-31" => 2
  "2018-09-01" => 0
  "2018-09-02" => 0
  "2018-09-03" => 0
  "2018-09-04" => 4
  "2018-09-05" => 0
  "2018-09-06" => 0
  "2018-09-07" => 0
  "2018-09-08" => 0
  "2018-09-09" => 0
  "2018-09-10" => 0
  "2018-09-11" => 0
  "2018-09-12" => 0
  "2018-09-13" => 0
  "2018-09-14" => 0
  "2018-09-15" => 0
  "2018-09-16" => 0
  "2018-09-17" => 0
  "2018-09-18" => 0
  "2018-09-19" => 0
  "2018-09-20" => 1
  "2018-09-21" => 0
  "2018-09-22" => 0
  "2018-09-23" => 0
  "2018-09-24" => 1
  "2018-09-25" => 0
  "2018-09-26" => 0
  "2018-09-27" => 2
);

I have done this using foreach loop where i am checking if my date is exists in $dateRanges array, but I want to know if there are any shortcut way like using array_column or array_combine or array_walk function.

Thanks

Answer 1

You can use combination of array_map() and array_merge()

$newArr = array_merge(array_map(function($v){return 0;}, $dateRanges), $result);

Check result in demo

Answer 2

The following should work, copying values from $array1 to $array2 or setting 0 if no value exists.
^{I have not tested this code so a little tweaking might be necessary.}

$array1 = array(/*...*/);
$array2 = array(/*...*/);
array_walk($array2, function (&$v, $k) use ($array1) {
    if (isset($array1[$k]))
        $v = $array1[$k];
    else
        $v = 0;
});