array's key match with another array php - php

Question

Ex :
First array:
Array
(
[0] => id
[1] => ADDRESS
[2] => ADDRESS1
[3] => name
)
Second array:
Array
(
[id] => 1
[name] => Ankit
[city] => SURAT
)
Required OUTPUT :
[id] => 1
[ADDRESS]=>
[ADDRESS1]=>
[name] => Ankit
here we can see that value of first array ADDRESS,ADDRESS1 doesn't exist in array 2 key,
so i need value to be set null for ADDRESS,ADDRESS1 and unnecessary field of array 2 is city which key doesn't exist in first array values is need to be unset from result array
CODE :
$field_arr= array('0'=>"id",
"1"=>"ADDRESS",
"2"=>"ADDRESS1",
'3'=>"name",
);
$arr=array("id"=>"1",
'name'=>"Ankit",
"city"=>"Ahmedabad");
$matching_fields =(array_diff_key(array_flip($field_arr),(array_intersect_key($arr,array_flip($field_arr)))));
if(!empty($matching_fields)){
foreach($matching_fields as $key=>$value){
$new_arr[$key]=null;
}
}
print_r($new_arr);
exit;
CURRENT OUTPUT OF NEW ARRAY :
Array
(
[ADDRESS] =>
[ADDRESS1] =>
)
but this is long process.as well as performance also matter. i want whole code reconstruct which i have made and just get output which is required output
Here some more need help need i want same sequence of key of output array same as first array value
my required output :
[id] => 1
[ADDRESS]=>
[ADDRESS1]=>
[name] => Ankit
current output :
[id] => 1
[name] => Ankit
[ADDRESS]=>
[ADDRESS1]=>
Thanks in advance

Answer 1

Just try with:
$keys = array('id', 'name', 'ADDRESS', 'ADDRESS1');
$data = array(
'id' => 1,
'name' => 'Ankit',
'city' => 'SURAT',
);
$output = $data + array_fill_keys($keys, null);
Output:
array (size=5)
'id' => int 1
'name' => string 'Ankit' (length=5)
'city' => string 'SURAT' (length=5)
'ADDRESS' => null
'ADDRESS1' => null

Answer 2

$keys = array_unique(array_merge($field_arr, array_keys($arr)));
$new_array = array();
foreach ($keys as $key)
{
$new_array[$key] = isset($arr[$key]) ? $arr[$key] : '';
}
echo "<pre>";
print_r($new_array);

Answer 3

You can use following;
$first = array(
"id",
"name",
"ADDRESS",
"ADDRESS1"
);
$second = array(
"id" => "1",
"name" => "Ankit",
"city" => "SURAT"
);
foreach ($first as $key) {
if ($second[$key] == null) {
$second[$key] = null;
}
}
var_dump($second);
Here is working demo: Demo