增量在php while循环中 - Incrementation In a php while loop

Incrementation In a php while loop

本文关键字：循环 while php | 更新日期: 2024-03-10

嗨，伙计们，我想知道你们是否可以帮助我在while循环中递增。我正在使用php编程一个在线测验，希望每次他们选择提交按钮时都更新测验编号，但变量$questionNumber只停留在一个上

我的代码显示在下面

<?php session_start(); ?>
<html>
<head>
<title> World Cup Quiz  </title>
</head>
<body>
<div align = center><strong> World Cup Quiz</strong></div>
<br />
<div align =center>
<?php

include ("dbConnect.php");
$_SESSION['number']=1;
$questionNumber = $_SESSION['number'];
$userScore=0;
$number= rand(1,4);
//search database for generated number and match ID
$dbQuery= "SELECT * FROM `questions 1.0` WHERE  `ID` =$number";
$dbResult=mysql_query($dbQuery);
echo "Question:".$questionNumber."/5<br>";
//Assign variables to each attribute
while ($dbRow=mysql_fetch_array($dbResult))
{

   $theID=$dbRow["ID"];
   $theQuestion=$dbRow["Question"];
   $theAnswer1=$dbRow["Correct Answer"];
   $theAnswer2=$dbRow["Wrong Answer 1"];
   $theAnswer3=$dbRow["Wrong Answer 2"];
   $theAnswer4=$dbRow["Wrong Answer 3"];
   $_SESSION['number']=$questionNumber+1;
}


  //Print Questions and Answers

    echo '<strong>'."$theQuestion".'</strong><br>';
   ?> <form name="correctAnswer" form method="post" action="quiz.php"> 
  <?php
   echo "$theAnswer1";?> <input type="radio" name="correctAnswer">
  <?php
   echo "<br>$theAnswer2"; ?> <input type="radio" name="wrongAnswer1"> 
   <?php
   echo "<br>$theAnswer3"; ?> <input type="radio" name="wrongAnswer2"> 
   <?php
   echo "<br>$theAnswer4"; ?> <input type="radio" name="wrongAnswer3"> 
   <br><input type="submit" value="Submit Answer">
   </form>

</div>
</body>
</html>

希望你能帮助

感谢

您正在重置脚本开头的数字：

$_SESSION['number']=1;

你需要把它改成类似于：

if (!isset($_SESSION['number']))
{
    $_SESSION['number']=1;
}

您可以将代码的这一部分更改为以下内容。

而不是：`

$_SESSION['number']=1;
$questionNumber = $_SESSION['number'];
$userScore=0;
$number= rand(1,4);

写下：-

  $number= rand(1,4);
    $questionNumber = 0;
    if(isset($_SESSION['number']))
    {
        $_SESSION['number'] = $_SESSION['number'] + 1;
        $questionNumber = $_SESSION['number'];
    }else{
    $_SESSION['number'] = 1;
}

我认为问题是，在检查会话是否已经设置并有效之前，您将会话分配为等于1。

希望添加一些