Ajax实现不刷新取最新商品
程序员文章站
2023-12-04 08:25:22
话不多说，请看代码：
话不多说，请看代码：
<?php
$conn = mysql_connect('localhost','root','123456') or die('连接失败');
mysql_select_db('ecshop');
mysql_query('set names utf8');
$attr = isset($_get['attr'])?$_get['attr']:'is_hot'; //由html 的ajax提交过来 然后根据它来取数据~
$sql = 'select goods_name,goods_id,shop_price from goods where '.$attr.' = 1 limit 0,3';
$rs = mysql_query($sql,$conn);
//var_dump($rs);
$goods = array();
while($row = mysql_fetch_assoc($rs)){
$goods[] = $row;
}
//print_r($goods);
?>
<table border='1'> //ajax 接收的就是 php输出内容 虽然它没echo 但也是输出在网页的内容 所以ajax 能接收~~！！！
<tr><td>商品id</td><td>商品名称</td><td>商品价格</td></tr>
<?php foreach($goods as $v){ ?>
<tr>
<td><?php echo $v['goods_id'];?></td>
<td><?php echo $v['goods_name'];?></td>
<td><?php echo $v['shop_price'];?></td>
</tr>
<?php }?>
</table>
html 的内容
<script>
var xhr = new xmlhttprequest();
function top3(attr){
var url = 'goods.php?attr=' + attr;
xhr.open('get',url);
xhr.onreadystatechange = function (){
if(xhr.readystate ==4){
var dobj = document.getelementsbytagname('div')[0].innerhtml = xhr.responsetext; //把从php 接收的内容放入innerhtml
}
}
xhr.send();
}
</script>
</head>
<body>
<input type="button" value="最新商品" onclick="top3('is_new');">
<input type="button" value="热卖商品" onclick="top3('is_hot');">
<input type="button" value="精品商品" onclick="top3('is_best');">
<div id="test">
</div>
</body>
实例2：根据输入的id 获取商品信息 并修改
<?php
$conn = mysql_connect('localhost','root','123456') or die('连接失败');
mysql_select_db('ecshop');
mysql_query('set names utf8');
$id = isset($_get['id'])?$_get['id']:1;
if($id==''){
$error['num'] = 1;
$error['msg'];
}
$sql = 'select goods_id,goods_name,shop_price,goods_number from goods where goods_id ='.$id;
$rs = mysql_query($sql);
if(!($goods = mysql_fetch_assoc($rs))){ //获取不到商品就返回false
echo '没有该商品！';
exit;
}
echo json_encode($goods); //把数组转成一个json 格式~~
?>
html端的内容
<script>
var xhr = new xmlhttprequest();
function modify(){
var inputs = document.getelementsbytagname('input')
var gid = inputs[0].value;
var url = 'search.php?id='+ gid；
xhr.open('get',url);
xhr.onreadystatechange = function (){
if(xhr.readystate ==4){
var data = eval('('+ xhr.responsetext +')') //把接收到的json 格式数据转成js的对象！
inputs[1].value = data.goods_name;
inputs[2].value = data.goods_number;
inputs[3].value = data.shop_price;
}
}
xhr.send(null) //经常漏写了~~~不写是发送不了请求的~~一定要写！
}
</script>
</head>
<body>
<h1>商品编辑</h1>
商品id:<input type="text" name="goods_id" onfocus="al()" onblur="modify();" /><br /> <span></span>
商品名称:<input type="text" name="goods_name" /><br />
商品库存:<input type="text" name="goods_number" /><br />
商品价格:<input type="text" name="shop_price" /><br />
<input type="submit" value="修改" />
</body>
以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持！
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