PHP range function

range

(PHP 3 >= 3.0.8, PHP 4, PHP 5)

range -- Create an array containing a range of elementsDescriptionarray range ( mixed low, mixed high [, number step] )

range() returns an array of elements from
low to high,
inclusive. If low > high, the sequence will be from high to low.

New parameter:
The optional step parameter was added in 5.0.0.

If a step value is given, it will be used as the
increment between elements in the sequence. step
should be given as a positive number. If not specified,
step will default to 1.

Example 1. range() examples

// array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
foreach (range(0, 12) as $number) {
echo $number;
}

// The step parameter was introduced in 5.0.0
// array(0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100)
foreach (range(0, 100, 10) as $number) {
echo $number;
}

// Use of character sequences introduced in 4.1.0
// array('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i');
foreach (range('a', 'i') as $letter) {
echo $letter;
}
// array('c', 'b', 'a');
foreach (range('c', 'a') as $letter) {
echo $letter;
}

Note:
Prior to PHP 4.1.0, range() only generated
incrementing integer arrays. Support for character sequences and
decrementing arrays was added in 4.1.0. Character sequence values
are limited to a length of one. If a length greater than one is
entered, only the first character is used.

Caution

In PHP versions 4.1.0 through 4.3.2, range() sees
numeric strings as strings and not integers. Instead, they will be
used for character sequences. For example, "4242"
is treated as "4".

See also shuffle(),
array_fill(), and
foreach.