Recipe 4.3. Initializing an Array to a Range of Integers


4.3.1. Problem

You want to assign a series of consecutive integers to an array.

4.3.2. Solution

Use range($start, $stop):

$cards = range(1, 52);

4.3.3. Discussion

For increments other than 1, you can use:

function pc_array_range($start, $stop, $step) {     $array = array();     for ($i = $start; $i <= $stop; $i += $step) {         $array[] = $i;     }     return $array; }

So for odd numbers:

$odd = pc_array_range(1, 52, 2);

And for even numbers:

$even = pc_array_range(2, 52, 2);

In PHP 5.0.0 and above, you don't need pc_array_range( ): just pass an increment to range( ) as a third argument:

$odd = range(1, 52, 2); $even = range(2, 52, 2);

4.3.4. See Also

Recipe 2.4 for how to operate on a series of integers; documentation on range( ) at http://www.php.net/range.




PHP Cookbook, 2nd Edition
PHP Cookbook: Solutions and Examples for PHP Programmers
ISBN: 0596101015
EAN: 2147483647
Year: 2006
Pages: 445

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