我正在尝试创建一个州资本猜谜游戏，其中状态将随机生成，然后从包含所有用户首都的下拉列表中猜测资本。 无论如何，他希望我们有一个带有数组的单独文件。该文件称为city_info.php，数组如下所示
$state_capitals = array(
'Alabama' => 'Montgomery',
我在让下拉列表中填充所有大写字母时遇到问题。
<?php
require_once "include/session.php";
if (!isset($session->valid)) {
header("location: login.php");
exit();
}
require_once "include/city_info.php";
/* DO NOT MODIFY THE ABOVE LINES !!!!! */
$states = array_keys($state_capitals);
$capitals = array_values($state_capitals);
$cities = array_merge($capitals, $other_cities);
sort($cities);
$params = (object) $_REQUEST;
print_r($params);
if (isset($params->guess)) {
$state_capitals = $params->capitals;
$answer = $params->answer;
$cities = $params->city;
}
?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta http-equiv="Cache-Control"
content="no-cache, max-age=0, no-store, must-revalidate" />
<title>State Capital Guess Game</title>
<style type="text/css">
body {
padding: 10px 20px;
}
#logout {
position: absolute;
top: 40px;
right: 40px;
}
div {
width: 320px;
padding: 10px;
border: 3px solid black;
border-radius: 10px;
color: black;
text-align:center;
background-color:#3399ff;
display:inline-block
}
/*
More style rules
*/
</style>
<script type="text/javascript">window.onunload = function(){}</script>
</head>
<body>
<a id="logout" href="logout.php">Log out</a>
<h2>State Capital Guess Game</h2>
<form action="program.php" method="get">
<button type="submit">Start Over</button>
</form>
<!--- computational form -->
<div>
<p>What is the Capital of PA</p>
<select name="cities">
<?php
foreach ($city as $value):
?>
<option <?php
if ($value == $params->city)
echo "selected";
?>
><?php
echo $value;
?></option>
<?php
endforeach;
?>
</select>
<input type="submit" name="choose" value="Choose" />
</form>
</div>
<?php
echo $state_capitals;
?>
</body>
</html>
你表达问题的方式，这听起来像是家庭作业。SO上的许多人很乐意帮助完成家庭作业，但是，有些人则不然;因此，出于礼貌，在询问有关家庭作业的问题时，请遵循以下准则： https://meta.stackexchange.com/questions/10811/how-do-i-ask-and-answer-homework-questions。您可能已经知道这一点，但想涵盖基础知识以防万一。
关于你的问题。我会稍微清理一下，这样遵循 HTML/PHP 就不难了。如果您替换当前代码，这应该有效：
<select name="cities">
<?php
$options = "";
foreach ($cities as $value){
$options .= '<option value="' . $value . '"';
if ($value == $params->city)
$options .= ' selected';
$options .= '>' . $value . '</option>';
}
echo $options;
?>
</select>
这样你只需要在HTML/PHP之间切换一次。希望对您有所帮助！