array_fill_keys

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

array_fill_keys — Fill an array with values, specifying keys

array_fill_keys(array $keys, mixed $value): array

Fills an array with the value of the value parameter, using the values of the keys array as keys.

keys: Array of values that will be used as keys. Illegal values for key will be converted to string.
value: Value to use for filling

Returns the filled array

Example #1 array_fill_keys() example

<?php
$keys = array('foo', 5, 10, 'bar');
$a = array_fill_keys($keys, 'banana');
print_r($a);
?>

The above example will output:

Array
(
    [foo] => banana
    [5] => banana
    [10] => banana
    [bar] => banana
)