通过键的后缀PHP合并数组

I have two arrays, that I want to merge as one according to keys suffix.

$keys = array(
  'staff_first_name' => NULL,
  'staff_last_name' => NULL,
  'staff_years' => NULL
);


$submitted_values = array( 
   'first_name' => 'jon',
   'last_name' => 'doe',
   'years' => 5
);

I understand I could use a function like shown here and modify it.

But is there a native php function that will accomplish this. I attempted to use array_merge_recursive but after reviewing the documentation It will not do what I need it to.

$wanted_array = array(
   'staff_first_name' => 'jon',
   'staff_last_name' => 'doe',
   'staff_years' => 5
);

If you know the two arrays are the same size, and in the same order, you can use array_combine with array_keys.

$wanted_array = array_combine(array_keys($keys), $submitted_values);

Because it's a suffix that is the same on each key we don't need to worry about it.
If we ksort the arrays they should both be sorted the same because the suffix is the same on all in key array.

$keys = array(
   'staff_first_name' => NULL,
   'staff_last_name' => NULL,
   'staff_years' => NULL
);


$values = array( 
    'years' => 5,
    'first_name' => 'jon',
    'last_name' => 'doe',
);

ksort($values);
ksort($keys);
Var_dump(array_combine(array_keys($keys), $values));

I intentionally placed years first to show that it works.
https://3v4l.org/cBNhk

If you need to reduce the $_POST to only these array items to be able to combine them you can use a combination of preg_grep, array_flip, array_values and array_intersect_key to filter out the wanted items from the array.

$val = preg_grep("/first_name|last_name|years/",array_values(array_flip($values)));

$values = Array_intersect_key($values, array_flip($val));
ksort($values);
ksort($keys);
Var_dump(array_combine(array_keys($keys), $values));

I added some extra items to simulate a larger mixed $_POST array.
https://3v4l.org/a3ju1

This is one of those questions where I must implore the OP to rethink their process. It only complicates your code to introduce associative keys that do not instantly synchronize with your form field names. This is the best advice that I can give you: declare a whitelist of keys and assign default values to each, then filter, then replace.

Since your values are all null, your code can be made more DRY by calling array_fill_keys().

The following can be written as one line of code, but to show each step, I've printed the arrays to screen after each function call.

Code: (Demo)

$defaults = array_fill_keys(['first_name', 'last_name', 'years'], null);
var_export($defaults);

$_GET = [
         'last_name' => 'doe',
         'Hackers' => 'can be naughty',
         'years' => 5
        ];
var_export($_GET);

$screened = array_intersect_key($_GET, $defaults);
var_export($screened);

$replaced = array_replace($defaults, $screened);
var_export($replaced);

Output:

array (
  'first_name' => NULL,
  'last_name' => NULL,
  'years' => NULL,
)array (
  'last_name' => 'doe',
  'Hackers' => 'can be naughty',
  'years' => 5,
)array (
  'last_name' => 'doe',
  'years' => 5,
)array (
  'first_name' => NULL,
  'last_name' => 'doe',
  'years' => 5,
)

...p.s. makes sure that you use prepared statements with placeholders if you are sending any of the values to the database.