Question

这是一个骰子游戏，当用户选择一个号码并点击提交时，页面随机显示骰子上的数字，如果用户猜对了，应该说是，你说得对，否则会说对不起你是错误。但它不会回应“你猜对了！”当数字匹配时。问题出在哪儿？它说对不起是不对的。非常感谢你！

<html>
<body>
<h1>Dice Game!</h1>

<h1>"Please guess a number on the dice!"</h1>


<?php
if ($_POST['subBtn']) {
    $num = $_POST['number'];

    if ($num == "$roll") {
        $comment = "you guessed right!";
    } else if ($num != "$roll") {
        $comment = "sorry it's wrong!";
    } 
}
?>

<p>     
<form name="number" action="activity-dice-game.php" method="post">
<select name="number">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
    <option value="6">6</option>
</select>
<input type="submit"name="subBtn" value="submit"/></input>
</form>
</p>

<?php
$roll = rand(1,6); 
echo "<p>You rolled a " . $roll . ". </p>";
echo "<img src=\"images/die" . $roll . ".gif\" alt=\"die image\">";
?>

</b> <? echo $comment; ?><br />

</body>
</html>

Answer 1

问题是当您加载表单$roll时，如果您检查用户提交的$num是否等于它，则设置为空！这意味着无论什么

if($num == $roll)

相当于：

if($num == null)

永远不会是真的！

只需将$roll = rand(1,6)放在脚本的顶部即可。

Answer 2

这应该有效：

<html>
<body>
<h1>Dice Game!</h1>

<h1>"Please guess a number on the dice!"</h1>


<?php
if ($_POST['subBtn']) {
    $num = $_POST['number'];
    $roll = rand(1,6); 

    if ($num == "$roll") {
        $comment = "you guessed right!";
    } else if ($num != "$roll") {
        $comment = "sorry it's wrong!";
    } 
}
?>

<p>     
<form name="number" action="activity-dice-game.php" method="post">
<select name="number">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
    <option value="4">4</option>
    <option value="5">5</option>
    <option value="6">6</option>
</select>
<input type="submit"name="subBtn" value="submit"/></input>
</form>
</p>

<?php
echo "<p>You rolled a " . $roll . ". </p>";
echo "<img src=\"images/die" . $roll . ".gif\" alt=\"die image\">";
?>

</b> <? echo $comment; ?><br />

</body>
</html>

一个没有正确回声的小骰子游戏

2 个答案: