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1<?php
2/**
3 * Pop PHP Framework (http://www.popphp.org/)
4 *
5 * @link       https://github.com/popphp/popphp-framework
6 * @author     Nick Sagona, III <dev@nolainteractive.com>
7 * @copyright  Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com)
8 * @license    http://www.popphp.org/license     New BSD License
9 */
10
11/**
12 * @namespace
13 */
14namespace Pop\Validator;
15
16/**
17 * Alphabetical validator class
18 *
19 * @category   Pop
20 * @package    Pop\Validator
21 * @author     Nick Sagona, III <dev@nolainteractive.com>
22 * @copyright  Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com)
23 * @license    http://www.popphp.org/license     New BSD License
24 * @version    4.0.0
25 */
26class Alpha extends AbstractValidator
27{
28
29    /**
30     * Method to evaluate the validator
31     *
32     * @param  mixed $input
33     * @return bool
34     */
35    public function evaluate(mixed $input = null): bool
36    {
37        // Set the input, if passed
38        if ($input !== null) {
39            $this->input = $input;
40        }
41
42        // Set the default message
43        if ($this->message === null) {
44            $this->message = 'The value must only contain characters of the alphabet.';
45        }
46
47        return (bool)(preg_match('/^[a-zA-Z]+$/', $this->input));
48    }
49
50}