单击按钮后,保存到MySQL然后显示CSS高亮显示

时间:2013-07-03 20:23:44

标签: php html mysql pdo

我有一个评级功能,其功能如下:一旦用户点击+1按钮,评级就会上升1,并保存到MySQL。我想要它做的是一旦点击,它就会改变 背景为不同颜色,如下图所示。

(我希望它能做的就是“曾经点击”),目前它只是更新背景为白色的数字)

注意:我只是在寻求建议或某种方式引导我朝着正确的方向发展,谢谢你。

没有点击:

enter image description here

点击后:

enter image description here

php / html表单:提交+1

<div class="up vote" name="voteUp" id="<?php echo $post_iD;?>">
    <div class="wrapper">+<?php echo $VoteRate;?></div>
</div>

AJAX:更新按钮

$(function()
{
    $(".vote").click(function()
    {
        var id = $(this).attr("id");
        var name = $(this).attr("name");
        var dataString = 'id='+ id ;
        var parent = $(this);

        if (name=='voteUp')
        {
            $.ajax(
            {
                type: "POST",
                url: "voting/up_vote.php",
                data: dataString,
                cache: false,
                success: function(html)
                {
                    parent.html(html);
                }
            });
        }
        return false;
    });
});

up_vote.php:从ajax提交

$ip = $_SERVER['REMOTE_ADDR']; 
if($_POST['id'])
{
    $sth = $db->prepare("SELECT add_iP FROM PostsRating WHERE post_iD_fk = :id AND add_iP = :ip");
    $sth->execute(array(':id' => $_POST['id'], ':ip' => $ip));

    if( $sth->fetchColumn() == 0)
    {
            $sth = $db->prepare("UPDATE posts set voteUp = voteUp+1 where post_iD = :id");
            $sth->execute(array(':id' => $_POST['id']));

            $sth = $db->prepare("INSERT into PostsRating (post_iD_fk, add_iP) VALUES (:id, :ip)");
            $sth->execute(array(':id' => $_POST['id'], ':ip' => $ip));
    } else  {
            $sth = $db->prepare("UPDATE posts set voteUp = voteUp-1 where post_iD = :id");
            $sth->execute(array(':id' => $_POST['id']));

            $sth = $db->prepare("DELETE FROM PostsRating WHERE post_iD_fk = :id AND add_iP = :ip");
            $sth->execute(array(':id' => $_POST['id'], ':ip' => $ip));
    }

    $sth = $db->prepare("SELECT voteUp FROM posts WHERE post_iD = :id");
    $sth->execute(array(':id' => $_POST['id']));

    $row = $sth->fetch();   

    echo $row['voteUp'];
}

3 个答案:

答案 0 :(得分:1)

在您的成功回调中,为什么不将课程设置为parent,然后更新.wrapper

success: function(html)
{
    parent.addClass("blue");
    parent.find(".wrapper").html("+ " + html);
}

当用户刷新页面并且您想继续显示蓝色时,您只需:

<?php
$ip = $_SERVER['REMOTE_ADDR']; 
$sth = $db->prepare("SELECT add_iP FROM PostsRating WHERE post_iD_fk = :id AND add_iP = :ip");
$sth->execute(array(':id' => $post_iD, ':ip' => $ip));
$class = ($sth->fetchColumn()) ? " blue" : "";
?>
<div class="up vote<?php echo $class; ?>" name="voteUp" id="<?php echo $post_iD;?>">
    <div class="wrapper">+<?php echo $VoteRate;?></div>
</div>

答案 1 :(得分:0)

首先,你不能拥有一个带有空格的类名 - 它将被解释为两个类, up vote

在php中你可以回应一些东西(确保将dataType设置为json)

echo(json_encode(array("success"=>true)));
exit();

之后jquery可以处理响应:

function(result) {
    var result_string = jQuery.parseJSON(result);
    if(result_string.success) {
        $(this).children(".wrapper").css("background-color", "blue")
    }
}

答案 2 :(得分:0)

你可以改变成功功能,用.css(“背景颜色”,“蓝色”)添加颜色,或者如果你想让它总是蓝色,如果vote_counter高于你可以将它添加到顶部你的代码:

if (parseInt($("#"+id).children(".wrapper").text()) >= 1) {
 $("#"+id).children(".wrapper").css("background-color","blue");
}