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vendor/workerman/validation/library/Rules/Base.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 is_null;
+use function mb_strlen;
+use function mb_substr;
+use function preg_match;
+use function sprintf;
+
+/**
+ * Validate numbers in any base, even with non regular bases.
+ *
+ * @author Carlos André Ferrari <caferrari@gmail.com>
+ * @author Henrique Moody <henriquemoody@gmail.com>
+ * @author William Espindola <oi@williamespindola.com.br>
+ */
+final class Base extends AbstractRule
+{
+    /**
+     * @var string
+     */
+    private $chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+
+    /**
+     * @var int
+     */
+    private $base;
+
+    /**
+     * Initializes the Base rule.
+     */
+    public function __construct(int $base, ?string $chars = null)
+    {
+        if (!is_null($chars)) {
+            $this->chars = $chars;
+        }
+
+        $max = mb_strlen($this->chars);
+        if ($base > $max) {
+            throw new ComponentException(sprintf('a base between 1 and %s is required', $max));
+        }
+        $this->base = $base;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        $valid = mb_substr($this->chars, 0, $this->base);
+
+        return (bool) preg_match('@^[' . $valid . ']+$@', (string) $input);
+    }
+}