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jiangsir 2024-09-11 21:56:05 +08:00
commit d4f95b998c
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<?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>