PHP 单选实例 - 自学教程(runoops.com)

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>PHP 单选 实例 - 自学教程(runoops.com)</title>
</head>
<body>
​
<?php
$q = isset($_GET['q'])? htmlspecialchars($_GET['q']) : '';
if($q) {
        if($q =='RUNOOPS') {
                echo 'runoops教程<br>http://www.runoops.com';
        } else if($q =='GOOGLE') {
                echo 'Google 搜索<br>http://www.google.com';
        } else if($q =='TAOBAO') {
                echo '淘宝<br>http://www.taobao.com';
        }
} else {
?><form action="" method="get"> 
    <input type="radio" name="q" value="RUNOOPS" />Runoops
    <input type="radio" name="q" value="GOOGLE" />Google
    <input type="radio" name="q" value="TAOBAO" />Taobao
    <input type="submit" value="提交">
</form>
<?php
}
?>
​
</body>
​
</html>