<?php
function createArray($start, $end){
$arr = array();
foreach(range($start, $end) as $number){
$arr[$number] = $number;
}
return $arr;
}

print_r(createArray(1, 10));
?>

Array
(
    [1] => 1
    [2] => 2
    [3] => 3
    [4] => 4
    [5] => 5
    [6] => 6
    [7] => 7
    [8] => 8
    [9] => 9
    [10] => 10
)