增量在php while循环中

问题描述：

Hi Guys I was wondering if you could help me with incrementing within my while loop. I am programming an online quiz using php and want the qustion number to update every time they select the submit button but the variable $questionNumber only stays at one

My code is shown below

<?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>

Hope you can help

Thanks

嗨大家好我想知道你是否可以帮助我在while循环中递增。我正在使用php编写在线测验，并希望每次选择提交按钮时更新qustion编号，但变量$ questionNumber只保留在一个 p>

我的代码如下所示 p >

 ＆lt;？php session_start（）;  ？＆GT; 
＆LT; HTML＆GT; 
＆LT; HEAD＆GT; 
＆LT;标题＆GT; 世界杯测验＆lt; / title＆gt; 
＆lt; / head＆gt; 
＆lt; body＆gt; 
＆lt; div align = center＆gt;＆lt; strong＆gt; 世界杯测验＆lt; / strong＆gt;＆lt; / div＆gt; 
＆lt; br /＆gt; 
 
＆lt; div align = center＆gt; 
＆lt;？php 
 
 
 
include（“dbConnect.php”）;  
 
 $ _SESSION ['number'] = 1; 
 $ questionNumber = $ _SESSION ['number']; 
 $ userScore = 0; 
 $ number = rand（1,4）; 
 
  //搜索数据库以生成数字并匹配ID 
 $ dbQuery =“SELECT * FROM` questions 1.0` WHERE`ID` = $ number”; 
 $ dbResult = mysql_query（$ dbQuery）; 
 
echo“问题：  “。$ questionNumber。”/ 5＆lt; br＆gt;“; 
 
 //为每个属性分配变量
 
而（$ dbRow = mysql_fetch_array（$ dbResult））
 
 {
 
 
 $  theID = $ dbRow [“ID”]; 
 $ theQuestion = $ dbRow [“Question”]; 
 $ theAnswer1 = $ dbRow [“正确答案”]; 
 $ theAnswer2 = $ dbRow [“错误答案1”  ]; 
 $ theAnswer3 = $ dbRow [“错误答案2”]; 
 $ theAnswer4 = $ dbRow [“错误答案3”]; 
 $ _SESSION ['number'] = $ questionNumber + 1; 
}  
 
 
 
 
 //打印问题和答案
 
 
 echo'＆lt; strong＆gt;'。“$ theQuestion”。＆lt; / strong＆gt;＆lt; br＆gt;'; 
？  ＆GT;  ＆lt; form name =“correctAnswer”form method =“post”action =“quiz.php”＆gt;  
＆lt;？php 
 echo“$ theAnswer1”;？＆gt;  ＆lt; input type =“radio”name =“correctAnswer”＆gt; 
＆lt;？php 
 echo“＆lt; br＆gt; $ theAnswer2”;  ？＆GT;  ＆lt; input type =“radio”name =“wrongAnswer1”＆gt;  
＆lt;？php 
 echo“＆lt; br＆gt; $ theAnswer3”;  ？＆GT;  ＆lt; input type =“radio”name =“wrongAnswer2”＆gt;  
＆lt;？php 
 echo“＆lt; br＆gt; $ theAnswer4”;  ？＆GT;  ＆lt; input type =“radio”name =“wrongAnswer3”＆gt;  
＆lt; br＆gt;＆lt; input type =“submit”value =“提交答案”＆gt; 
＆lt; / form＆gt; 
 
 
＆lt; / div＆gt; 
＆lt; / body＆gt; 
 
＆lt;  / html＆gt; 
  code>  pre> 
 
 希望你能提供帮助 p> 
 
 
谢谢 p> 
  div>

答

You are resetting the number at the start of your script:

$_SESSION['number']=1;

You need to change that to something like:

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

答

You may change this part of your code to the following.

instead of : `

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

write this :-

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

I think the problem is you are assigning the session to be equal to 1 before checking if it already set and valid session.

Hope that adds some

增量在php while循环中

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