Printing the alphabet in PHP

I was wondering of there was an smarter way to print the whole alphabet in PHP than just creating an array containing all off the letters by my self.

I present to you, the range() function.

<?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;
}
?>