php jquery ajax

1.php文件如下

<?php
header('Content-Type:text/html;charset=utf-8');
?>

<script type="text/javascript"src="http://code.jquery.com/jquery.min.js"></script>
<scripttype="text/javascript">
$(function() {
    $("#subbtn").click(function() {
        var params = $('input').serialize();
        var url = "你的服务器端 php";

        $.ajax({
            type: "post",
            url: url,
            dataType: "json",
            data: params,
            success: function(msg){
                var tishi = "您提交的姓名为：" + msg.name +
                "<br/> 您提交的密码为：" + msg.password;
                $("#tishi").html(tishi);
                $("#tishi").css({color: "green"});
            }
        });
    });

});

</script>
<p><labelfor="name">姓名：</label>
<inputid="name"name="name"type="text"/>
</p>

<p><labelfor="password">密码：</label>
<inputid="password"name="password"type="password"/>
</p>

<spanid="tishi"></span>
<p><inputid="subbtn"type="button"value="ajax 测试"/></p>

2.服务器 PHP 代码如下

<?php
echo json_encode($_POST);