<!--客户端发送-->
<form >
	<input type="text" name="user1"><br/>
	<input type="password" name="password1"><br/>
	<input type="submit" value="GET方式提交"/>
</form>

//服务端处理
//doGet.php
<?php
	echo $_GET['user1'];
	echo "<br/>";
	echo $_GET['password1'];
?>

POST

<!--客户端发送-->
<form >
	<input type="text" name="user2"><br/>
	<input type="password" name="password2"><br/>
	<input type="submit" value="POST方式提交"/>
</form>

//服务端处理
<?php
	echo $_POST['user2'];
	echo "<br/>";
	echo $_POST['password2'];
?>