range
(PHP 3>= 3.0.8, PHP 4 )
range --
Create an array containing a range of elements
Description
array
range ( mixed low, mixed high [, int step])
range() returns an array of elements from
low to high,
inclusive. If low > high, the sequence will be from high to low.
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 foreach(range(0, 9) as $number) {
echo $number;
}
foreach(range(0, 100, 10) 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.
The step parameter was added in 4.4.0.
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;
} |
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See shuffle() for another example of its use.