php mysql怎么实现点赞功能-PHP问题-PHP中文网

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>

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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);
?>

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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);
		});
	});
});

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