首先,对不起,如果措辞不好,因为我是代码的初学者.
我目前正在从事在线计算机科学课程,但是我对如何做一小部分非常困惑.我们需要为此活动使用数组,其中用户有多个选择,每个不同的选择具有不同/唯一的文本输出.一切正常,除了我需要一个选择随机选择的选项,但是我对如何制作它有点困惑.您可以从我的代码中看到选项1-8.我希望它随机选择其中一个选项.
这是我的代码：
<?PHP
$train[0] = "Canada";
$train[1] = "Sahara Desert";
$train[2] = "Russia";
$train[3] = "Chernobyl";
$train[4] = "United States";
$train[5] = "north Korea";
$train[6] = "Germany";
$train[7] = "Hawaii";
?>
<!DOCTYPE html>
<html>
<head>
Took out everything here,it's not important.
</head>
<body>
<center>
<h1>Vacation Time!</h1>
<h4>You and your family just won the lottery! You all want to go on vacation,but nobody can agree where to go. Inside each train cart has a card with a location written on it. Whatever you find is where you're going! </h4>
<form name="form1" action="activity-2-7-arrays-a.PHP" method="post">
<label>Which cart on the train do you want to choose?</label>
<br>
<select name="cart" required>
<option value="1">First Cart</option>
<option value="2">Second Cart</option>
<option value="3">Third Cart</option>
<option value="4">Fourth Cart</option>
<option value="5">Fifth Cart</option>
<option value="6">Sixth Cart</option>
<option value="7">Seventh Cart</option>
<option value="8">Eight Cart</option>
<option value="show">Show all options</option>
<option value="any">Choose Randomly</option>
<br>
</select><br/>
<input type="submit" name="subButton" class="subButton" value="Go!"/><br/>
</form>
<h1><u>Final Results</u></h1>
<?PHP
if($_POST['subButton']) {
$cart = $_POST['cart'];
$roll = rand(1,9);
if($cart == show) {
for($x = 1; $x <= 9; $x++) {
echo "<p> You Could have ender up in... </p>";
echo "<h2> " . $train[$x] . "</h2>";
}
return;
}
echo "<h2>"."Well,it looks like you're going to " . $train[$cart] . "! Have fun! </h2>";
}
return;
if ($cart == $roll) {
}
echo "<h2>"."Can't handle the pressure? You were selected to go to " . $train[$roll] . "! Have fun! </h2>";
?>
我也确定它有点乱.希望你明白我的意思.如果你能够向我解释这个非常有用的答案.谢谢 ：)
无论用户选择如何,您都会随机生成一个值,并将其与用户的选择和其他奇怪的事物进行比较.
<?PHP
if($_POST['subButton']) {
$cart = $_POST['cart'];
$roll = rand(1,9);
在检查用户是否选择“随机选择”以及为什么生成1到9之间的随机值之前,您正在生成随机值？ $train数组以索引0开头,以索引7结束.
if($cart == show) {
字符串需要引用.
for($x = 1; $x <= 9; $x++) {
再次将$x从1循环到9是没有意义的,因为你的数组索引.
echo "<p> You Could have ender up in... </p>";
echo "<h2> " . $train[$x] . "</h2>";
由于$train中的最后一个指数为7,因此当$x达到8时将失败.
}
return;
}
echo "<h2>"."Well,it looks like you're going to " . $train[$cart] . "! Have fun! </h2>";
}
return;
因此,如果用户没有选择“显示所有选项”,则会向他显示他所选择的位置.如果用户选择“随机选择”,这将失败,因为$cart将具有值’any’且$train [‘any’]不存在.
这是具有正确逻辑的代码.
<?PHP
if($_POST['subButton']) {
$cart = $_POST['cart'];
if ($cart == 'any') {// Check if user selected 'Choose Randomly'
$roll = rand(0,7);
echo "<h2>"."Can't handle the pressure? You were selected to go to " . $train[$roll] . "! Have fun! </h2>";
}
else {
if ($cart == 'show') { // If user selected 'Show all options'
echo "<p> You Could have ender up in... </p>";
for($x = 0; $x <= 7; $x++) {
echo "<h2> " . $train[$x] . "</h2>";
}
}
else { // User selected cart so show him chosen location
echo "<h2>"."Well,it looks like you're going to " . $train[$cart] . "! Have fun! </h2>";
}
}
}
?>