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[github/wallabag/wallabag.git] / vendor / symfony / form / Symfony / Component / Form / Util / FormUtil.php
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1<?php
2
3/*
4 * This file is part of the Symfony package.
5 *
6 * (c) Fabien Potencier <fabien@symfony.com>
7 *
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
10 */
11
12namespace Symfony\Component\Form\Util;
13
14/**
15 * @author Bernhard Schussek <bschussek@gmail.com>
16 */
17class FormUtil
18{
19 /**
20 * This class should not be instantiated
21 */
22 private function __construct() {}
23
24 /**
25 * Returns whether the given data is empty.
26 *
27 * This logic is reused multiple times throughout the processing of
28 * a form and needs to be consistent. PHP's keyword `empty` cannot
29 * be used as it also considers 0 and "0" to be empty.
30 *
31 * @param mixed $data
32 *
33 * @return Boolean
34 */
35 public static function isEmpty($data)
36 {
37 // Should not do a check for array() === $data!!!
38 // This method is used in occurrences where arrays are
39 // not considered to be empty, ever.
40 return null === $data || '' === $data;
41 }
42}