From d4f95b998cbda7f1db3e8b411a35f2cfd538e211 Mon Sep 17 00:00:00 2001
From: jiangsir <1463310682@qq.com>
Date: Wed, 11 Sep 2024 21:56:05 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=87=E4=BB=B6=E8=87=B3?=
 =?UTF-8?q?=20src?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/index.php | 103 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/index.php
diff --git a/src/index.php b/src/index.php
new file mode 100644
index 0000000..f313bf1
--- /dev/null
+++ b/src/index.php
@@ -0,0 +1,103 @@
+<?php
+session_start();
+
+if (!isset($_SESSION['correct_count'])) {
+    $_SESSION['correct_count'] = 0;
+}
+
+if ($_SESSION['correct_count'] >= 10) {
+    echo "Congratulations! You are clever. Here is your flag: FLAGFLAGFLAG";
+    exit();
+}
+
+function generateQuestion() {
+    $nums = [];
+    $operators = ['+', '-', '*', '/'];
+
+    for ($i = 0; $i < 9; $i++) {
+        $nums[] = rand(1000000, 99999999);
+    }
+
+    $expression = "{$nums[0]}";
+    for ($i = 1; $i < count($nums); $i++) {
+        $operator = $operators[array_rand($operators)];
+        $expression .= " $operator {$nums[$i]}";
+    }
+
+    // 确保除数不为0
+    if (strpos($expression, '/ 0') !== false) {
+        return generateQuestion();  // 重新生成题目
+    }
+
+    // 计算答案
+    try {
+        $answer = eval("return ($expression);");
+        if (is_float($answer)) {
+            $answer = round($answer, 2);
+        }
+    } catch (DivisionByZeroError $e) {
+        return generateQuestion();  // 处理除以0的情况
+    }
+
+    $_SESSION['answer'] = $answer;
+    return $expression;
+}
+
+if ($_SERVER['REQUEST_METHOD'] == 'POST') {
+    if (isset($_POST['hiahia'])) {
+        $userAnswer = trim($_POST['hiahia']);
+        $correctAnswer = $_SESSION['answer'];
+
+        // 处理浮点数比较
+        if (abs(floatval($userAnswer) - floatval($correctAnswer)) < 0.01) {
+            $_SESSION['correct_count'] += 1;
+            if ($_SESSION['correct_count'] >= 10) {
+                echo "Congratulations! You are clever. Here is your flag: FLAGFLAGFLAG";
+                exit();
+            } else {
+                $message = "Correct! Keep going! You have answered {$_SESSION['correct_count']} correctly.";
+            }
+        } else {
+            $_SESSION['correct_count'] = 0;
+            $message = "Wrong answer or time out! Try again.";
+        }
+    }
+}
+
+$question = generateQuestion();
+
+?>
+
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="refresh" content="3"> <!-- 将刷新时间改为3秒 -->
+    <title>Advanced Math Challenge</title>
+    <style>
+    body {
+        font-family: Arial, sans-serif;
+        text-align: center;
+        margin-top: 50px;
+    }
+    </style>
+</head>
+
+<body>
+
+    <h1>Give me your answer for 3 seconds:</h1> <!-- 文案也改成3秒 -->
+    <h2><?php echo $question; ?> ?</h2>
+
+    <?php if (isset($message)) : ?>
+    <p><?php echo $message; ?></p>
+    <?php endif; ?>
+
+    <form method="POST">
+        <input type="text" name="hiahia" autofocus autocomplete="off" required>
+        <button type="submit">Submit</button>
+    </form>
+
+</body>
+
+</html>
\ No newline at end of file
