... array range ( mixed low, mixed high) . ... foreach(range(0, 9) as $number) { echo $number; } foreach(range('a', 'z') as $letter) { echo $letter; } foreach(range('z', 'a') as $letter) { echo $letter; } . ... Example 2. ... array_reverse can be used to flip the order of a range foreach(array_reverse(range(0,9)) as $number) { echo $number; } # array_map() can be used to turn integers into characters using chr() foreach(array_map('chr', range(ord('a'),ord('z'))) as $character) { echo $character; } . ...