feat: add Validation Strict Rules

system/Validation/FormatRules.php

@@ -317,7 +317,8 @@ public function valid_url_strict(?string $str = null, ?string $validSchemes = nu
             return false;
         }
 
-        $scheme       = strtolower(parse_url($str, PHP_URL_SCHEME) ?? ''); // absent scheme gives null
+        // parse_url() may return null and false
+        $scheme       = strtolower((string) parse_url($str, PHP_URL_SCHEME));
         $validSchemes = explode(
             ',',
             strtolower($validSchemes ?? 'http,https')

system/Validation/StrictRules/CreditCardRules.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Validation\StrictRules;
+
+use CodeIgniter\Validation\CreditCardRules as NonStrictCreditCardRules;
+
+/**
+ * Class CreditCardRules
+ *
+ * Provides validation methods for common credit-card inputs.
+ *
+ * @see http://en.wikipedia.org/wiki/Credit_card_number
+ */
+class CreditCardRules
+{
+    private NonStrictCreditCardRules $nonStrictCreditCardRules;
+
+    public function __construct()
+    {
+        $this->nonStrictCreditCardRules = new NonStrictCreditCardRules();
+    }
+
+    /**
+     * Verifies that a credit card number is valid and matches the known
+     * formats for a wide number of credit card types. This does not verify
+     * that the card is a valid card, only that the number is formatted correctly.
+     *
+     * Example:
+     *  $rules = [
+     *      'cc_num' => 'valid_cc_number[visa]'
+     *  ];
+     *
+     * @param mixed $ccNumber
+     */
+    public function valid_cc_number($ccNumber, string $type): bool
+    {
+        if (! is_string($ccNumber)) {
+            return false;
+        }
+
+        return $this->nonStrictCreditCardRules->valid_cc_number($ccNumber, $type);
+    }
+}

system/Validation/StrictRules/FileRules.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Validation\StrictRules;
+
+use CodeIgniter\Validation\FileRules as NonStrictFileRules;
+
+/**
+ * File validation rules
+ */
+class FileRules extends NonStrictFileRules
+{
+}