// range(string|int|float $start, string|int|float $end, int|float $step = 1): array
$array_numbers = range(1, 5);
var_dump($array_numbers);
$array_strings = array_map('strval', range('1', '5'));
var_dump($array_strings);
/*
run:
array(5) {
[0]=>
int(1)
[1]=>
int(2)
[2]=>
int(3)
[3]=>
int(4)
[4]=>
int(5)
}
array(5) {
[0]=>
string(1) "1"
[1]=>
string(1) "2"
[2]=>
string(1) "3"
[3]=>
string(1) "4"
[4]=>
string(1) "5"
}
*/