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To create an array of a series of consecutive numbers or alphabetical letters or even any ASCII characters, you can use PHP function range():

$a = range(0, 100, 2); // $a is an array of even integers from 0 to 100.

$b = range('a', 'z'); // $b now contains all lowercase alphabetic letters from a to z.

To create an array of a series of identical values, use function array_fill():

$dumb = array_fill(-10, 3, 'dumb');

$dumb is as follows:

Array
(
    [-10] => 'dumb'
    [-9] => 'dumb'
    [-8] => 'dumb'
)

Yeah.

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• PHP: Create an Array
• PHP: Check if A String Contain Only Uppercase / Capital Letters
• Regular Expressions for Natural Numbers or Positive Integers (1, 2, 3, …), Negative Integers and Non-negative Integers
• PHP: Count the Number of Occurrences of Each Unique Value in an Array
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