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cacme/vendor/workerman/validation/library/Rules/Charset.php

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+<?php
+
+/*
+ * Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+declare(strict_types=1);
+
+namespace Respect\Validation\Rules;
+
+use Respect\Validation\Exceptions\ComponentException;
+
+use function array_diff;
+use function in_array;
+use function mb_detect_encoding;
+use function mb_list_encodings;
+
+/**
+ * Validates if a string is in a specific charset.
+ *
+ * @author Alexandre Gomes Gaigalas <alganet@gmail.com>
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ * @author William Espindola <oi@williamespindola.com.br>
+ */
+final class Charset extends AbstractRule
+{
+    /**
+     * @var string[]
+     */
+    private $charset;
+
+    /**
+     * Initializes the rule.
+     *
+     * @throws ComponentException
+     */
+    public function __construct(string ...$charset)
+    {
+        $available = mb_list_encodings();
+        if (!empty(array_diff($charset, $available))) {
+            throw new ComponentException('Invalid charset');
+        }
+
+        $this->charset = $charset;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        return in_array(mb_detect_encoding($input, $this->charset, true), $this->charset, true);
+    }
+}