- new blog cms

2026-07-04 19:41:44 -04:00
parent 64cb76a846
commit 782b983bf4
819 changed files with 3103 additions and 88735 deletions
@@ -0,0 +1,43 @@
+<?php
+declare(strict_types=1);
+
+namespace NeonBlog;
+
+final class Captcha
+{
+    /** @return array{token: string, question: string} */
+    public static function challenge(): array
+    {
+        if (session_status() !== PHP_SESSION_ACTIVE) {
+            return ['token' => '', 'question' => ''];
+        }
+
+        $a = random_int(2, 12);
+        $b = random_int(2, 12);
+        $token = bin2hex(random_bytes(12));
+        $_SESSION['captcha'][$token] = [
+            'answer' => (string) ($a + $b),
+            'expires' => time() + 900,
+        ];
+
+        return [
+            'token' => $token,
+            'question' => 'What is ' . $a . ' + ' . $b . '?',
+        ];
+    }
+
+    public static function verify(string $token, string $answer): bool
+    {
+        if (session_status() !== PHP_SESSION_ACTIVE || $token === '') {
+            return false;
+        }
+
+        $challenge = $_SESSION['captcha'][$token] ?? null;
+        unset($_SESSION['captcha'][$token]);
+        if (!is_array($challenge) || (int) ($challenge['expires'] ?? 0) < time()) {
+            return false;
+        }
+
+        return trim($answer) === (string) ($challenge['answer'] ?? '');
+    }
+}