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vendor/workerman/validation/library/Rules/Subset.php

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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\Rules;
+
+use function array_diff;
+use function is_array;
+
+/**
+ * Validates whether the input is a subset of a given value.
+ *
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ * @author Singwai Chan <singwai.chan@live.com>
+ */
+final class Subset extends AbstractRule
+{
+    /**
+     * @var mixed[]
+     */
+    private $superset;
+
+    /**
+     * Initializes the rule.
+     *
+     * @param mixed[] $superset
+     */
+    public function __construct(array $superset)
+    {
+        $this->superset = $superset;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        if (!is_array($input)) {
+            return false;
+        }
+
+        return array_diff($input, $this->superset) === [];
+    }
+}