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2023-01-02 19:56:44 +08:00
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+<?php
+
+/*
+ * This file is part of Respect/Validation.
+ *
+ * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
+ *
+ * For the full copyright and license information, please view the LICENSE file
+ * that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Validation\Helpers;
+
+use function in_array;
+
+/**
+ * Helper to identify values that Validation consider as "undefined".
+ *
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ */
+trait CanValidateUndefined
+{
+    /**
+     * Finds whether the value is undefined or not.
+     *
+     * @param mixed $value
+     */
+    private function isUndefined($value): bool
+    {
+        return in_array($value, [null, ''], true);
+    }
+}