<!DOCTYPE html>
<!--
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and open the template in the editor.
-->
<html>
???<head>
???????<meta charset="UTF-8">
???????<title>fuck</title>
???</head>
???<body>
<?php
$q = isset($_POST[‘q‘])? htmlspecialchars($_POST[‘q‘]) : ‘‘;
if($q) {
???????if($q ==‘RUNOOB‘) {
???????????????echo ‘菜鸟教程<br>http://www.runoob.com‘;
???????} else if($q ==‘GOOGLE‘) {
???????????????echo ‘Google 搜索<br>http://www.google.com‘;
???????} else if($q ==‘TAOBAO‘) {
???????????????echo ‘淘宝<br>http://www.taobao.com‘;
???????}
} else {
?>
<form action="" method="get">
???<select name="q">
???<option value="">选择一个站点:</option>
???<option value="RUNOOB">Runoob</option>
???<option value="GOOGLE">Google</option>
???<option value="TAOBAO">Taobao</option>
???</select>
???<input type="submit" value="提交">
???</form>
<?php
}
?>
???</body>
</html>
表单method使用get,被响应的php（表单种action提交指向的php）可以使用$_GET、$REQUEST
表单method使用post，被响应处理的php可以使用$_POST、$_REQUEST
POST与GET、REQUEST响应的php写法对比
原文地址：https://www.cnblogs.com/drkang/p/8459841.html