Question

我正在继续编写一个迷宫生成器来自学PHP ...

我已经设置了一个会话，以及一个收集名称和迷宫大小的表单（5-20）。

在第一次运行时，工作正常，迷宫就会生成。

我希望进一步的会话是记住名称，但重新输入大小。

如果会话不是新的，我尝试使用另一种（不同的）形式，但它没有识别/运行它和错误，告诉我$ mazesize是一个无法识别的索引。

代码：

<?php
session_start();
error_reporting(-1);
?>
<html>
<head>
</head>
<body>
<?php

include 'ClassFunc1.php';

//program functionality
if (!isset($_SESSION['name']) && !isset($_POST['name'])){
    //if no data, print form
        ?><table><tr>
        <form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
        <td>Name: </td><td><input type="text" name="name"></td></tr>
        <tr><td>Maze size (min 5 max 20): </td><td><input type="text" name="mazesize"></td></tr>
        <tr><td colspan="2" align="center"><input type="submit" name="submit" value="Submit"></td></tr>
        </form></table>
        <?php
}else if (!isset($_SESSION['name']) && isset($_POST['name']) && isset($_POST['mazesize'])){
        //if a session doesn't exist but the form has been submitted
        //check to see if the form has all required values
        //create a new session
        if(!empty($_POST['name'])){
        $_SESSION['name']=$_POST['name'];
        $_SESSION['start']=time();
        echo "Welcome, ".$_POST['name'].". A new session has been activated for you. Click <a href=".$_SERVER['PHP_SELF'].">here</a> to refresh the page.";
        if($_POST['mazesize']>20){
            $m_size=20;
        }elseif($_POST['mazesize']<5){
            $m_size=5;
        }else{
            $m_size=$_POST['mazesize'];
        }
        define("COL_MAX",$m_size);
        define("ROW_MAX",$m_size);
        run_maze($_POST['name']);
        close_down();
        }else{
            echo "ERROR. Please enter your name and a maze size";
        }
}else if (isset($_SESSION['name'])) {
        //if a previous session exists
        //calculate elapsed time since session start and now
        echo "Welcome back, ".$_SESSION['name'].". This session was activated ".round((time()-$_SESSION['start'])/60)." minute(s) ago. Click <a href=".$_SERVER['PHP_SELF'].">here</a> to refresh the page.<br />";
        echo "Current session ID: ".session_id();
    //Ask for a new maze size
        ?><table><tr>
        <form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
        <td>Maze size (min 5 max 20): </td><td><input type="text" name="mazesize"></td></tr>
        <tr><td colspan="2" align="center"><input type="submit" name="submit" value="Submit"></td></tr>
        </form></table>
        <?php
        if($_POST['mazesize']>20){
            $m_size=20;
        }elseif($_POST['mazesize']<5){
            $m_size=5;
        }else{
            $m_size=$_POST['mazesize'];
        }
    define("COL_MAX",$m_size);
    define("ROW_MAX",$m_size);
    run_maze($_POST['name']);
    close_down();
}

//session_destroy();


?>

“包含”文件是类，方法＆amp;功能

我确定我做错了什么，有人可以帮忙吗？

非常感谢

ETA：

（在echo“ERROR ... line”之后修改代码

    }else if (isset($_SESSION['name']) && !isset($_POST['n_mazesize'])) {
            //if a previous session exists but n_mazesize not set
            //calculate elapsed time since session start and now
            echo "Welcome back, ".$_SESSION['name'].". This session was activated ".round((time()-$_SESSION['start'])/60)." minute(s) ago. Click <a href=".$_SERVER['PHP_SELF'].">here</a> to refresh the page.<br />";
            echo "Current session ID: ".session_id();
        //Ask for a new maze size
            ?><table><tr>
            <form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
            <td>Maze size (min 5 max 20): </td><td><input type="text" name="n_mazesize"></td></tr>
            <tr><td colspan="2" align="center"><input type="submit" name="submit" value="Submit"></td></tr>
            </form></table>
            <?php
    }else if (!isset($_SESSION['name']) && isset($_POST['n_mazesize'])){
            //if a previous session exists and n_mazesize is set
            //calculate elapsed time since session start and now
            echo "Welcome back, ".$_SESSION['name'].". This session was activated ".round((time()-$_SESSION['start'])/60)." minute(s) ago. Click <a href=".$_SERVER['PHP_SELF'].">here</a> to refresh the page.<br />";
            echo "Current session ID: ".session_id();
            if(!empty($_POST['n_mazesize'])){
            if($_POST['n_mazesize']>20){
                $m_size=20;
            }elseif($_POST['n_mazesize']<5){
                $m_size=5;
            }else{
                $m_size=$_POST['n_mazesize'];
            }
        run_maze($_SESSION['name'], $m_size);
        close_down();
        }

    //session_destroy();
    }

    ?>
</body>
</html>

这要求大小，但提交时返回一个空白屏幕： - （

Answer 1

$ _POST ['mazesize']的值仅在提交表单时可用。你应该添加一个条件：

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    // use posted data here
}

（php）初始表单后获得额外的输入？

1 个答案: