直接上代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>多项选择题</title>
</head>
<body>
<p>以下哪些城市属于省会城市？</p>
<form action="" method="post" name="form">
<input name="answer[]" type="checkbox" value="A" />广州<br>
<input name="answer[]" type="checkbox" value="B" />成都<br>
<input name="answer[]" type="checkbox" value="C" />北京<br>
<input name="answer[]" type="checkbox" value="D" />福州<br>
<input name="answer[]" type="checkbox" value="E" />重庆<br>
<input name="answer[]" type="checkbox" value="F" />沈阳<br>
<input name="send" type="submit" value="提交" />
</form>
<?php
if(isset($_POST['send']))
{
$answer=$_POST['answer'];
$choice=" ";
for($i=0;$i<count($answer);$i++)
$choice.=$answer[$i];
if($choice =='ABDF')
show('恭喜你，答对了！');
else
show('很遗憾，重新答！');
}
function show($message)
{
echo"<script>alert('$message')</script>";
}
?>
</body>
</html>
在浏览器上运行出现以下界面：
我们选择好后点击提交：
标签：PHP,哪些,城市,多选题,属于,省会 From： https://www.cnblogs.com/0625wangqian/p/18220410