needed for chart helper to generate ranges for x & y axyis

range.php

<?php
foreach(range('a', 'z') as $letter) {
    echo $letter;
}
?>

This function will also work with numbers. This will print all the numbers from 1 to 12.

<?php
foreach(range(0, 12) as $number) {
    echo $number;
}
?>

And if you are smart, and run PHP 5, you can even print every tenth number (0,10,20,30...)

<?php
foreach(range(0, 100, 10) as $number) {
    echo $number;
}
?>