通知系统 jQuery、PHP 和 MySQL
我正在尝试使用 jQuery 和 PHP 开发通知系统。所以我在数据库中创建了一个新表，我将在其中存储所有新通知。使用 jQuery 我已经能够显示一个警报（气泡图标），显示添加到数据库中的新行数，但我现在卡住了，因为我真的不知道如何更新数据库（触发 update.php 文件） ) 当我单击激活下拉菜单的图标 (.icon-bell) 时。
这是我添加到索引页面的 jQuery 脚本
<script type="text/javascript">
$(document).ready(function(){
$("#datacount").load("select.php");
setInterval(function(){
$("#datacount").load('select.php')
}, 20000);
});
</script>
这是索引页中的 HTML 代码
<li class="dropdown dropdown-extended dropdown-notification dropdown-dark" id="header_notification_bar">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" data-hover="dropdown" data-close-others="true">
<i class="icon-bell">
</i>
<span class="badge badge-success"><div id="datacount">
</div>
</span>
</a>
<ul class="dropdown-menu" >
<li class="external">
<h3>
<span class="bold">12 pending</span>
notifications
</h3>
<a href="page_user_profile_1.html">view all</a>
</li>
<li>
<ul class="dropdown-menu-list scroller" style="height: 250px;" data-handle-color="#637283">
<li>
<a href="javascript:;">
<span class="time">just now</span>
<span class="details">
<span class="label label-sm label-icon label-success">
<i class="fa fa-plus">
</i>
</span> New user registered. </span>
</a>
</li>
</ul>
</li>
</ul>
</li>
这是 select.php 文件
<?php
$sql = "SELECT * from tbl_noti where status = 'unread'";
$result = $conn->query($sql);
$row = $result->fetch_assoc();
$count = $result->num_rows;
echo $count;
$conn->close();
?>
这是 update.php 文件
<?php
$sql = "update tbl_noti set status = 'read'";
$result = $conn->query($sql);
$row = $result->fetch_assoc();
$count = $result->num_rows;
echo $count;
$conn->close();
?>
小智 5
您可以使用 PHP + Ajax 来完成此任务。我创建了一个简单的通知系统，您可以轻松地从 GitHub（https://github.com/shahroznawaz/php-notifications）克隆它。
让我们创建一个 index.php 文件并放入以下代码。它将创建一个表单。所有数据都将通过 ajax 调用获取并在视图中更新。
<!DOCTYPE html>
<html>
<head>
<title>Notification using PHP Ajax Bootstrap</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<br /><br />
<div class="container">
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="#">PHP Notification Tutorial</a>
</div>
<ul class="nav navbar-nav navbar-right">
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown"><span class="label label-pill label-danger count" style="border-radius:10px;"></span> <span class="glyphicon glyphicon-bell" style="font-size:18px;"></span></a>
<ul class="dropdown-menu"></ul>
</li>
</ul>
</div>
</nav>
<br />
<form method="post" id="comment_form">
<div class="form-group">
<label>Enter Subject</label>
<input type="text" name="subject" id="subject" class="form-control">
</div>
<div class="form-group">
<label>Enter Comment</label>
<textarea name="comment" id="comment" class="form-control" rows="5"></textarea>
</div>
<div class="form-group">
<input type="submit" name="post" id="post" class="btn btn-info" value="Post" />
</div>
</form>
</div>
</body>
</html>
现在创建这样的ajax调用：
<script>
$(document).ready(function(){
// updating the view with notifications using ajax
function load_unseen_notification(view = '')
{
$.ajax({
url:"fetch.php",
method:"POST",
data:{view:view},
dataType:"json",
success:function(data)
{
$('.dropdown-menu').html(data.notification);
if(data.unseen_notification > 0)
{
$('.count').html(data.unseen_notification);
}
}
});
}
load_unseen_notification();
// submit form and get new records
$('#comment_form').on('submit', function(event){
event.preventDefault();
if($('#subject').val() != '' && $('#comment').val() != '')
{
var form_data = $(this).serialize();
$.ajax({
url:"insert.php",
method:"POST",
data:form_data,
success:function(data)
{
$('#comment_form')[0].reset();
load_unseen_notification();
}
});
}
else
{
alert("Both Fields are Required");
}
});
// load new notifications
$(document).on('click', '.dropdown-toggle', function(){
$('.count').html('');
load_unseen_notification('yes');
});
setInterval(function(){
load_unseen_notification();;
}, 5000);
});
</script>
您还需要从数据库中获取所有记录并更新所查看通知的状态。创建 fetch.php 文件并添加以下代码：
<?php
include('connect.php');
if(isset($_POST['view'])){
// $con = mysqli_connect("localhost", "root", "", "notif");
if($_POST["view"] != '')
{
$update_query = "UPDATE comments SET comment_status = 1 WHERE comment_status=0";
mysqli_query($con, $update_query);
}
$query = "SELECT * FROM comments ORDER BY comment_id DESC LIMIT 5";
$result = mysqli_query($con, $query);
$output = '';
if(mysqli_num_rows($result) > 0)
{
while($row = mysqli_fetch_array($result))
{
$output .= '
<li>
<a href="#">
<strong>'.$row["comment_subject"].'</strong><br />
<small><em>'.$row["comment_text"].'</em></small>
</a>
</li>
';
}
}
else{
$output .= '<li><a href="#" class="text-bold text-italic">No Noti Found</a></li>';
}
$status_query = "SELECT * FROM comments WHERE comment_status=0";
$result_query = mysqli_query($con, $status_query);
$count = mysqli_num_rows($result_query);
$data = array(
'notification' => $output,
'unseen_notification' => $count
);
echo json_encode($data);
}
?>
现在您将能够在导航栏中看到这样的通知：
当您单击下拉菜单时，查看通知的状态将更新，计数将消失。
