php mysql怎么实现点赞功能
1、index.php 读取数据库点赞表的数量。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>点赞</title>
<script src="jquery-2.1.1.min.js"></script>
<script src="index.js"></script>
</head>
<body>
<button id="btn">赞</button>
<span id="result">
<?php
$con = mysqli_connect('localhost', 'username', 'password');
if(! $con )
{
die('连接失败: ' . mysqli_error($con));
}
mysqli_select_db($con,'jwhuang');
mysqli_query($con,"set names utf8");
$result = mysqli_query($con,"SELECT * FROM zan");
while($row = mysqli_fetch_array($result))
{
echo $row['zan'];
}
mysqli_close($con)
?>
</span>
</body>
</html> 2、server.php 用户点击赞按钮就向数据库插入一条数据。
<?php
header("Content-type:text/html;charset=utf-8");
$con = mysqli_connect('localhost', 'username', 'password');
if(!$con )
{
die('连接失败: ' . mysqli_error($con));
}
mysqli_select_db($con,'jwhuang');
mysqli_query($con,"set names utf8");
mysqli_query($con,"UPDATE zan SET zan = zan+1");
$result = mysqli_query($con,"SELECT * FROM zan");
if(isset($_GET['name'])){
while($row = mysqli_fetch_array($result))
{
echo $row['zan'];
}
}else{
echo "赞失败！";
}
mysqli_close($con);
?> 3、index.js 请求数据
$(document).ready(function(){
$("#btn").on("click",function(){
$.get("sever.php",{name:$("#btn").val()},function(data){
$("#result").text(data);
});
});
}); 更多PHP相关知识，请访问PHP中文网！
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