html文件中demo2_index.html
--------------------------------------------------------------------------------------------------------------------
<! DOCTYPE>
<html>
<head>
<meta charset= "utf-8" >
<title>Demo2 </title>
<style>
body, input, button, select, h1 {
font-size: 18px;
line-height: 1.8em;
}
</style>
</head>
<body>
<h1>员工查询</h1>
<label>输入员工编号：</label>
<input type= "text" id= "keyword">
<button id= "search">查询</button>
<p id= "searchResult"></p>
<h1>员工新建</h1>
<label>请输入员工姓名</label>
<input type= "text" id= "peopleName"> <br>
<label>请输入员工编号</label>
<input type= "text" id= "peopleNumber"> <br>
<label>请输入员工性别</label>
<select id= "peopleSex">
<option>男</option>
<option>女</option>
</select>
<br>
<label>请输入员工职位</label>
<input type= "text" id= "peopleJob"> <br>
<button id= "save">保存</button>
<p id= "createResult"></p>
<script>
document.getElementById( "search" ).onclick = function (){
//发送Ajax查询请求并处理
var request = new XMLHttpRequest();
request.open( "GET" ,"/ajax/demo2.php?number=" + document.getElementById("keyword" ).value);
request.send();
// 监听
request.onreadystatechange = function (){
if(request.readyState === 4){
if(request.status === 200){
document.getElementById( "searchResult" ).innerHTML = request.responseText;
} else {
alert( "发生错误：" + request.status);
}
}
}
}
document.getElementById( "save" ).onclick = function (){
var request = new XMLHttpRequest();
request.open( "POST" ,"/ajax/demo2.php" );//POST请求是隐藏的不需要显示参数
var data = "name =" + document.getElementById("peopleName" ).value
+ "&number=" + document.getElementById("peopleNumber" ).value
+ "&sex=" + document.getElementById("peopleSex" ).value
+ "&job=" + document.getElementById("peopleJob" ).value;
request.setRequestHeader("Content-Type" ,"application/x-www-form-urlencoded" );
request.send(data);
if(request.readyState === 4){
if(request.status === 200){
document.getElementById( "createResult" ).innerHTML = request.responseText;
} else {
alert( "发生错误：" + request.status);
}
}
}
</script>
<!--<script>
document.getElementById("search").onclick() = function();
var request = new XMLHttpRequest();
request.open("GET","demo2.php?number="+document.getElementById("keyword").value);
request.send();
request.onreadystatechange = function () {
if(request.state===4){
if(request.status===200){
document.getElementById("searchResult").innerHTML = request.responseText;
}else{
alert("参数错误:"+request.status);
}
}
}
</script>-->
</body>
</html>
---------------------------------------------------------------------------------------------------------------
php文件中demo2.php
<?php
/**
* Created by PhpStorm.
* User: moka
* Date: 2016/3/5
* Time: 5:22
*/
//设置页面内容html编码格式“utf-8”
header ("Content-type:text/plain;charset=utf-8" );
//header("Content-Type:application/json;charset=utf-8");
//header("Content-Type:text/xml;charset=utf-8");
//header("Content-type:text/html;charset=utf-8");
//header("Content-type:application/javascript;charset=utf-8");
//定义一个多维数组
$people = array(
array( "name" =>"洪七" ,"number" =>"101" ,"sex" =>"男" ,"job" =>"产品经理" ),
array( "name" =>"郭靖" ,"number" =>"102" ,"sex" =>"男" ,"job" =>"程序员" ),
array( "name" =>"黄蓉" ,"number" =>"103" ,"sex" =>"女" ,"job" =>"测试员" )
);
//判断如果是get请求，则进行搜索，如果是POST请求，则进行新建
//$_SERVER是一个超全局变量，在一个脚本的全部作用域中都可以用，不用使用global关键字
//$_SERVER["REQUEST_METHOD"]返回访问页面使用的请求方法
if ($_SERVER[ "REQUEST_METHOD" ]=="GET" ){
search();
} elseif( $_SERVER["REQUEST_METHOD" ]=="POST" ){
create();
}
//通过员工编号搜索员工
function search(){
//检查是否有员工编号的参数
//isset检测变量是否设置;empty判断值是否为空
//超全局变量 $_GET 和$_POST用于收集表单数据
if(! isset( $_GET[ "number"])|| empty ($_GET[ "number" ])){
echo "参数错误" ;
return ;
}
//函数之外声明的变量拥有Global作用域，只能在函数以外进行访问。
//global关键词用于访问函数内的全局变量
global $people;
//获取number参数
$number = $_GET["number" ];
$result = "没有找到员工！" ;
//遍历$people多维数组，查找key值为number的员工是否存在，如果存在，则修改返回结果
foreach($people as $key){
if($key[ "number" ]==$number){
$result = "找到员工：员工编号：" .$key["number" ]."员工姓名：" .$key["name" ]."员工性别：" .$key["sex" ]."员工职位：" .$key["job" ];
break;
}
}
echo $result;
}
//创建员工
function create(){
//判断信息是否填写完全、
if(! isset( $_POST[ "name"])|| empty ($_POST[ "name" ])
||! isset ($_POST[ "number" ])||empty ($_POST[ "number" ])
||! isset ($_POST[ "sex" ])||empty ($_POST[ "sex" ])
|| isset ($_POST[ "job" ])||empty ($_POST[ "job" ])
){
echo "参数错误，员工信息填写不全" ;
return;
}
//TODO ;获取POST表单数据并保存到数据库
//保存成功
echo "员工：" .$_POST[ "name" ]."信息保存成功！" ;
}
?>