goldvision.com - PHP / range

Description

array range ( mixed low, mixed high)

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

Example 1. range() examples

foreach(range(0, 9) as $number) {
    echo $number;
}
foreach(range('a', 'z') as $letter) {
    echo $letter;
}
foreach(range('z', 'a') as $letter) {
    echo $letter;
}

Note: Prior to version 4.1.0 the range() function only generated incrementing integer arrays. Support for character sequences and decrementing arrays was added in 4.1.0.
Example 2. Simulating decrementing ranges and character sequences
# 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;
}

See shuffle() for another example of its use.