php - "How to have the user add two random integers on a single page using $_POST"

Question

我正在尝试创建一个 PHP 和 HTML 加法游戏，用户可以在其中猜测两个随机整数的总和。然而，当用户提交答案时，整数再次随机化，改变总和并使用户的猜测不正确。

<?php
  $x = (rand(1,10));
  $y = (rand(1,10));
  $sum = $x + $y;
  if (isset($_POST['submit']))
  {
     $guess = $_POST['guess'];
     if ($sum == $guess)
     {
        echo "nice, you got it right.";
     }
     else {
        echo "aw, too bad. <br>";
     }
  }
  echo "<br>What is " . $x . " + " . $y . "? <br>";?>  

  <form action="" method="post">
       <input name="guess" type="text" />
       <input name="submit" type="submit" />
  </form>

当 $guess==$sum 时，我希望输出是“很好，你做对了”，但是当提交表单时 $sum 发生了变化，使 2 个变量不相等。

Answer 1

尝试使用session，存储这两个随机数。 PHP Session

就像这样。

<?php

session_start();

  if (isset($_POST['submit']))
   {
     $sum = $_SESSION['y'] + $_SESSION['x'];
     $guess = $_POST['guess'];
                if ($sum == $guess)
                    {
                    echo "nice, you got it right.";
                    }
                else {
                    echo "aw, too bad. <br>";
                    }
  }
  $_SESSION['x']= (rand(1,10));
  $_SESSION['y']= (rand(1,10));
echo "<br>What is " . $_SESSION['x'] . " + " . $_SESSION['y'] . "? <br>";
    ?>  

<form action="" method="post">
<input name="guess" type="text" />
<input name="submit" type="submit" />
</form>

希望我能回答你的问题。只需阅读 PHP session ，它对您有很大帮助。