Javascript 协助完成以下五星评级脚本_Javascript_Php_Html_Mysql_Css

Javascript 协助完成以下五星评级脚本

javascript php html mysql css

Javascript 协助完成以下五星评级脚本,javascript,php,html,mysql,css,Javascript,Php,Html,Mysql,Css,在这里，JavaScript和CSS运行平稳。但每当我尝试运行PHP文件时，它都会显示一个错误，说明未定义的索引，如下所示： Notice: Undefined index: do in C:\wamp\www\PROJECT\jquery_tutorial_starrating\update.php on line 8 Call Stack # Time Memory Function Location 1 0.0016 375888 {main}( ) ..\u

在这里，JavaScript和CSS运行平稳。但每当我尝试运行PHP文件时，它都会显示一个错误，说明未定义的索引，如下所示：

Notice: Undefined index: do in C:\wamp\www\PROJECT\jquery_tutorial_starrating\update.php on line 8
Call Stack
#   Time    Memory  Function    Location
1   0.0016  375888  {main}( )   ..\update.php:0

Notice: Undefined index: do in C:\wamp\www\PROJECT\jquery_tutorial_starrating\update.php on line 14
Call Stack
#   Time    Memory  Function    Location
1   0.0016  375888  {main}( )   ..\update.php:0

我的html代码是：

    <html>
     <head> 

     <script src="rating/jquery.min.js" type="text/javascript"></script> 
     <script src="rating/starrating.js" type="text/javascript"></script> 
     <link href="rating/starrating.css" rel="stylesheet" type="text/css" media="screen" /> 
     </head> 
     <body> 
      <h2>Star Rater</h2> 
     <ul class='star-rating'> 
     <li class="current-rating" id="current-rating"><!-- will show current rating --></li> 
     <span id="ratelinks"> 
     <li><a href="javascript:void(0)" title="1 star out of 5" class="one-star">1</a></li> 
     <li><a href="javascript:void(0)" title="2 stars out of 5" class="two-stars">2</a></li> 
    <li><a href="javascript:void(0)" title="3 stars out of 5" class="three-  stars">3</a></li> 
    <li><a href="javascript:void(0)" title="4 stars out of 5" class="four-stars">4</a></li> 
    <li><a href="javascript:void(0)" title="5 stars out of 5" class="five-stars">5</a></li> 
    </span> 
    </ul>
</body> 
</html>

我的starrating.js文件-

// JavaScript Document
$(document).ready(function() {
    // get current rating
    getRating();
    // get rating function
    function getRating(){
        $.ajax({
            type: "GET",
            url: "update.php",
            data: "do=getrate",
            cache: false,
            async: false,
            success: function(result) {
                // apply star rating to element
                $("#current-rating").css({ width: "" + result + "%" });
            },
            error: function(result) {
                alert("some error occured, please try again later");
            }
        });
    }

    // link handler
    $('#ratelinks li a').click(function(){
        $.ajax({
            type: "GET",
            url: "update.php",
            data: "rating="+$(this).text()+"&do=rate",
            cache: false,
            async: false,
            success: function(result) {
                // remove #ratelinks element to prevent another rate
                $("#ratelinks").remove();
                // get rating after click
                getRating();
            },
            error: function(result) {
                alert("some error occured, please try again later");
            }
        });

    });
});

我的PHP文件：

<?php
// connect to database
$dbh=mysql_connect ("localhost", "abc", "") or die ('Cannot connect to the database');
mysql_select_db ("star",$dbh);



if($_GET['do']=='rate')
{

// do rate
rate();
}
else if($_GET['do']=='getrate')
{
// get rating
getRating();
}

// function to retrieve
function getRating(){

$sql= "select * from vote";
$result=@mysql_query($sql);
$rs=@mysql_fetch_array($result);
// set width of star
$rating = (@round($rs[value] / $rs[counter],1)) * 20; 
echo $rating;
}

// function to insert rating
function rate(){
$text = strip_tags($_GET['rating']);
$update = "update vote set counter = counter + 1, value = value +    ".$_GET['rating']."";

$result = @mysql_query($update); 
if(@mysql_affected_rows() == 0){
    $insert = "insert into vote (counter,value) values     ('1','".$_GET['rating']."')";
    $result = @mysql_query($insert); 
}
}
?>

如果您试图访问不存在的数组索引，PHP会发出警告。与其使用

$\u GET['do']=='rate'

，不如尝试

isset（$\u GET['do']）&&$\u GET['do']=='rate'

，对于其他数组访问也是如此。此外，

带标签

也不安全，无法防止SQL注入；改用

mysql\u real\u escape\u string

。更好的是，切换到PDO或mysqli并使用参数化。您能告诉我@in@$_GET['do']的用法吗？请看这里，它将抑制错误消息：

<?php
// connect to database
$dbh=mysql_connect ("localhost", "abc", "") or die ('Cannot connect to the database');
mysql_select_db ("star",$dbh);



if($_GET['do']=='rate')
{

// do rate
rate();
}
else if($_GET['do']=='getrate')
{
// get rating
getRating();
}

// function to retrieve
function getRating(){

$sql= "select * from vote";
$result=@mysql_query($sql);
$rs=@mysql_fetch_array($result);
// set width of star
$rating = (@round($rs[value] / $rs[counter],1)) * 20; 
echo $rating;
}

// function to insert rating
function rate(){
$text = strip_tags($_GET['rating']);
$update = "update vote set counter = counter + 1, value = value +    ".$_GET['rating']."";

$result = @mysql_query($update); 
if(@mysql_affected_rows() == 0){
    $insert = "insert into vote (counter,value) values     ('1','".$_GET['rating']."')";
    $result = @mysql_query($insert); 
}
}
?>