取消设置过早触发并取消之前的操作

时间：2018-03-09 17:51:21

标签： php

我试图为一个简单的游戏创建一些代码 - 选择箭头落地的位置，然后选择计算机＆＃34;射击＆＃34;它然后显示＆＃34;做得好＆＃34;或者＆＃34;没有它落在别处＆＃34;消息，带有箭头的图像着陆（一次，刷新应使它们消失）。显然正在使用正在发生的POST重定向，但是对于SESSION变量的未设置似乎并不重要，它似乎过早取消，这意味着消息根本不显示。< / p>

在线搜索，我一直无法看到错误（SESSION正在进行，重定向正在运行，但无论在哪里取消设置（）都取消设置并且根本不显示，它和＆＃ ＃39; s可能很简单，所以会很高兴看到我的代码（我已经在我的各种尝试中留下了注释，所以你可以看到问题）：

<?php
session_start();

function GuessArrowGame(){

    if (isset ($_POST['YourArrow'])){
        //Create array of possible answers
        $possibleScores = array ("miss","1","3","5","7","9");
        //print_r ($possibleScores);

        //Check output from dropdown
        //echo "POST is:";
        //print_r ($_POST);

        //Get _POST and make into a string
        $YourArrowLands = $_POST['YourArrow'];
        $SESSION['YourArrowLands'] = $YourArrowLands;
        //echo "Your arrow Lands \n";
        //print_r ($SESSION['YourArrowLands']);
        //echo "\n";
        //echo "\n";


        //Randomise array
        shuffle ($possibleScores);
        //print_r ($possibleScores);

        //Make variable from randomised array
        $ArrowLands = $possibleScores['0'];
        //echo "Arrow Lands: $ArrowLands \n";


        //Make Image from each arrow landing
        $ArrowLandsImage="0";

        if ($ArrowLands=="9"){
            $ArrowLandsImage="Gold.png";
        }elseif($ArrowLands=="7"){
            $ArrowLandsImage="Red.png";
        }elseif($ArrowLands=="5"){
            $ArrowLandsImage="Blue.png";
        }elseif($ArrowLands=="3"){
            $ArrowLandsImage="Black.png";
        }elseif($ArrowLands=="1"){
            $ArrowLandsImage="White.png";
        }elseif($ArrowLands=="miss"){
            $ArrowLandsImage="Miss.png";
        }
        echo "<p>Arrowlandsimage is ".$ArrowLandsImage."</p>\n";
        $_SESSION['ArrowImage'] = $ArrowLandsImage;
        echo $_SESSION['ArrowImage'];

        //check score against arrow
        if ($SESSION['YourArrowLands'] == $ArrowLands){
            $_SESSION['message'] = "Great job, you guessed right, you scored ".$ArrowLands.".\n";
        }else{
            $_SESSION['message'] = "Sorry, you guessed $YourArrowLands, but you scored ".$ArrowLands.".\n";
        }


        //Display image of arrow Landing
        //$SESSION['ArrowImage'] = $ArrowLandsImage;        


        header ("Location:Game1.php");
        return;
    }
};  


print_r ($_SESSION);
function flashMessages(){

    if (isset($_SESSION['ArrowImage'])) {
  echo $_SESSION['ArrowImage'];
  //unset($_SESSION['ArrowImage']);
}




    if ( isset ($_SESSION['message']) ) {
        echo("<p>".$_SESSION['message']."</p>\n");
        //unset($_SESSION['success']);
    }
    if ( isset ($_SESSION['ArrowImage']) ) {
echo '<img src="'.$_SESSION['ArrowImage'].'" title="Arrow Lands" alt="Arrow Lands" />';         
        echo "\n";
//      unset($_SESSION['ArrowImage']);
    }
}

        ?>
<!DOCTYPE html>
<html lang="en">
<head>
      <meta charset="UTF-8">
      <title>Evolution Archers</title>
      <!--<link rel="icon" type="image/x-icon" href="Images/EvoLogo.ico"/>
      <link rel="stylesheet" href="CSS/Style.css">
      <script src="JS/Script.js"></script>-->
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body id="top">
<!--<img  id="MenuShow" class="showLink" onclick="showHide('Menu');return false;" src="Images/Menu.png" alt="Menu Show">
<div id="Menu" class="more">
<img  id="MenuHide" class="hideLink" onclick="showHide('Menu');return false;" src="Images/MenuEnd.png" alt="Menu Hide">
</div>
      <nav class = "nav" id="nav">
            <a class="home" href='Index.html'>
              <img src="Images/EvoWebPageTopTransparent.png" alt="Home">
             </a>
                <a href='History.html'>History of the Club</a>
                <a href='Gallery.html'>Gallery</a>
                <a href='Upcoming.html'>Upcoming Events</a>
                <a href='Past.html'>Past Events</a>
                <a href='Beginners.html'>Beginners</a>
                <a href='LYG.html'>London Youth Games</a>
                <a href='Members.html'>Members Area</a>
                <a class="active" href='Useful.html'>Useful Stuff</a>
                <a href='Rules.html'>Rules and Etiquette</a>

        </nav>-->
                <div class=MainPage>

    <section>
        <h1>Can you hit the Gold?</h1>

        <!--Insert Code for clicky button here*/-->
        <form method="post">
        <p>
        <label for="GuessArrow">Where will your arrow land?</label>
        <select name="YourArrow" id="GuessArrow">
        <option value="9">9 - Gold</option>
        <option value="7">7 - Red</option>
        <option value="5">5 - Blue</option>
        <option value="3">3 - Black</option>
        <option value="1">1 - WhiteGold</option>
        <option value="miss">m - Miss</option>
        </select>
        </p>
        <input type="submit"/>
        </form>

        <?php
        GuessArrowGame();

        flashmessages();

    //$message = isset($_SESSION['message']) ? $_SESSION['message'] : false;
    //$imageShow = isset($_SESSION['ArrowImage']) ? $_SESSION['ArrowImage'] : false;

       /*if ( $message !== false )  {
        echo("<p>$message</p>\n");
 // unset($_SESSION['message']);
   }*/
        //Display image of arrow Landing
        /*if ($imageShow !== false){
            echo '<img src="'.$imageShow.'" title="Arrow Lands" alt="Arrow Lands" />';          
        echo "\n";
    //unset($_SESSION['ArrowImage']);
        }   */  

    /*  if (isset ($_SESSION['message'])){
    echo ("<p>".$_SESSION['message']."</p>\n");
    //echo ("printing check");
    unset($_SESSION['message']);

}*/

        ?>

<?php
//  echo($_SESSION['ArrowImage']);

    //unset($_SESSION['ArrowImage']);
    //unset($_SESSION['message']);
?>


        </section>
  <footer>
           <p>All content &copy; Evolution Archers 2004-2018 or individual members of Evolution Archers.</p>
           <p>Evolution Archers are not responsible for the content of other websites.</p>
           <p>Links to other websites do not indicate any association between Evolution Archers and other websites.</p>

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

感谢您的帮助

1 个答案:

答案 0 :(得分：0)

问题是，您希望在重定向并显示一次后清除您在$ _SESSION中设置的消息。然而，这不是它的作用，因此：

您的代码设置了重定向，但继续执行整页（以及取消设置）。然后它重定向回自身。当然你看到$ _SESSION变量是空的。

要在代码中修复此问题，请按以下步骤操作...

  1. 在开始输出GuessArrowGame();之前将<!DOCTYPE html>...移至。
  2. 在function GuessArrowGame(){}
    3. 之前session_write_close();内添加header("Location:Game1.php");
  3. 在function GuessArrowGame(){}
    4. 之后exit;内添加header("Location:Game1.php");
  4. 将所有$SESSION修复为您遇到的$_SESSION。
  5. 将所有unset（或只是$_SESSION=[];）放在代码底部。

    6. 清除评论并添加以上内容后的代码：

    <?php
session_start();

function GuessArrowGame() {
    if (isset ($_POST['YourArrow'])) {
        $possibleScores = array ("miss","1","3","5","7","9");
        $YourArrowLands = $_POST['YourArrow'];
        $_SESSION['YourArrowLands'] = $YourArrowLands;
        shuffle ($possibleScores);
        $ArrowLands = $possibleScores['0'];
        $ArrowLandsImage="0";
        if ($ArrowLands=="9"){
            $ArrowLandsImage="Gold.png";
        }elseif($ArrowLands=="7"){
            $ArrowLandsImage="Red.png";
        }elseif($ArrowLands=="5"){
            $ArrowLandsImage="Blue.png";
        }elseif($ArrowLands=="3"){
            $ArrowLandsImage="Black.png";
        }elseif($ArrowLands=="1"){
            $ArrowLandsImage="White.png";
        }elseif($ArrowLands=="miss"){
            $ArrowLandsImage="Miss.png";
        }
        echo "<p>Arrowlandsimage is ".$ArrowLandsImage."</p>\n";
        $_SESSION['ArrowImage'] = $ArrowLandsImage;
        echo $_SESSION['ArrowImage'];
        if ($_SESSION['YourArrowLands'] == $ArrowLands){
            $_SESSION['message'] = "Great job, you guessed right, you scored ".$ArrowLands.".\n";
        }else{
            $_SESSION['message'] = "Sorry, you guessed $YourArrowLands, but you scored ".$ArrowLands.".\n";
        }

        session_write_close();
        header("Location: 998.php");
        exit;
        return;
    }
};
function flashMessages(){
    if (isset($_SESSION['ArrowImage'])) {
        echo $_SESSION['ArrowImage'];
    }
    if ( isset ($_SESSION['message']) ) {
        echo("<p>".$_SESSION['message']."</p>\n");
    }
    if ( isset ($_SESSION['ArrowImage']) ) {
        echo '<img src="'.$_SESSION['ArrowImage'].'" title="Arrow Lands" alt="Arrow Lands" />';         
        echo "\n";
    }
}

GuessArrowGame();

?>
<!DOCTYPE html>
<html lang="en">
<head>
      <meta charset="UTF-8">
      <title>Evolution Archers</title>
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body id="top">
    <div class=MainPage>
    <section>
        <h1>Can you hit the Gold?</h1>

        <form method="post">
        <p>
        <label for="GuessArrow">Where will your arrow land?</label>
        <select name="YourArrow" id="GuessArrow">
        <option value="9">9 - Gold</option>
        <option value="7">7 - Red</option>
        <option value="5">5 - Blue</option>
        <option value="3">3 - Black</option>
        <option value="1">1 - WhiteGold</option>
        <option value="miss">m - Miss</option>
        </select>
        </p>
        <input type="submit"/>
        </form>

        <?php flashmessages(); ?>

        </section>
    <footer>
           <p>All content &copy; Evolution Archers 2004-2018 or individual members of Evolution Archers.</p>
           <p>Evolution Archers are not responsible for the content of other websites.</p>
           <p>Links to other websites do not indicate any association between Evolution Archers and other websites.</p>
    </footer>
    </div>
</body>
</html>
<?php
    unset($_SESSION['ArrowImage']);
    unset($_SESSION['message']);
    unset($_SESSION['success']);
?>
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