[英]how to display records selected from mysql database in jquery dialog popup in php.?
[英]Popup message cannot display new update records from php mysql
我已经制作了带有自动刷新功能的弹出消息,因此每隔几分钟,弹出窗口就会出现以显示记录。 而且有效。
以下是自动刷新的JavaScript代码:
$(document).ready(function() {
setInterval(function() {
$('#rtnotice').load('plugins/notice/n_notice_invoice.php').fadeIn("slow");
}, 5000)
});
n_notice_invoice.php的代码
<script>
$(document).ready(function(){
$("#hide").click(function(){
$("#noticearea").hide();
});
});
</script>
<?php
try{
require_once "../../config/c_config.php";
$db = dbConn::getConnection();
$timestamp = $_REQUEST['term'];
$sqlck = $db->prepare("SELECT COUNT(id_notice_alert) as ttlinv FROM str_notice_alert WHERE date_alert > '$timestamp'");
$sqlck->execute();
$resck = $sqlck->fetch(PDO::FETCH_ASSOC);
if($resck['ttlinv'] == '0')
{}else{
?>
<div id="noticearea">
<div id="modal">
<div class="modal-content">
<div class="header">
<div id="circle" align="center"><h1><?php echo $resck['ttlinv'];?></h1></div><div class="titlenotice"><h1>NOTICE ALERT<?php echo $timestamp; ?></h1></div>
<div class="break"></div>
</div>
<div class="copy">
<p>
<table width="100%" class="gridtable">
<tr><th>No</th><th>Name</th><th>Status</th><th>Location</th><th>Date</th></tr>
<?php
$sqll = $db->prepare("SELECT * FROM str_notice_alert");
$sqll->execute();
while($resl = $sqll->fetch(PDO::FETCH_ASSOC)){
?>
<tr><td align="center"><?php echo $resl['id_notice_alert']; ?></td><td><?php echo $resl['alert_name']; ?></td><td align="center"><?php echo $resl['alert_status']; ?></td><td align="center"><?php echo $resl['alert_location']; ?></td><td><?php echo $resl['date_alert']; ?></td></tr>
<?php } ?>
</table>
</p>
</div>
<div class="cf footer">
<button id="hide" class="btn">Close</button>
</div>
</div>
<div class="overlay"></div>
</div></div>
<?php
$sqltrunc = $db->prepare("TRUNCATE TABLE str_notice_alert");
$sqltrunc->execute();
}$db = null;}
catch (PDOException $e) {
echo "Connection Error " . $e->getMessage();
}
?>
显示弹出消息后,它将显示文件n_notice_invoice.php现有记录,并通过可用查询删除记录。 在任何出现。 但是问题是,为什么记录没有更新/更改。 除非我直接刷新文件n_notice_invoice.php,然后自动刷新显示最新数据。
$timestamp = $_REQUEST['term'];
每次您调用该页面时都应更新。 您应该使用传递$ timestamp作为参数的Ajax加载页面,而不是仅仅加载它。
为了得到您需要的东西,我可以建议您使用长时间轮询吗? PHP进行长时间轮询,或者使用node.js更好。 以php为例,例如“服务器”页面:
$timeStart = time();
// Create connection
$con = mysqli_connect('localhost','root','','polldb');
// Check connection
if (mysqli_connect_errno($con))
die ('Failed to connect to MySQL: ' . mysqli_connect_error() );
// select where item is new
if(isset($_POST['timestamp'])){
$timestamp = $_POST['timestamp'];
}else{
// get current database time
$row = mysqli_fetch_assoc(mysqli_query($con,'SELECT now() as now'));
$timestamp = $row['now'];
}
$sql = "SELECT * FROM `notification` WHERE timestamp > '$timestamp'";
$newData = false;
$notifications = array();
// loop while there is no new data and is running for less than 20 seconds
while(!$newData && (time()-$timeStart)<20){
// check for new data
$result = mysqli_query($con,$sql);
while($row = mysqli_fetch_assoc($result)){
$notifications[] = $row;
$newData = true;
}
// let the server rest for a while
usleep ( 500000 );
}
// get current database time
$row = mysqli_fetch_assoc(mysqli_query($con,'SELECT now() as now'));
$timestamp = $row['now'];
mysqli_close($con);
// output
$data = array('notifications'=>$notifications,'timestamp'=>$timestamp);
echo json_encode($data);
exit;
和客户:
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
<script>
$(function(){
pullNotification();
});
function pullNotification(timestamp){
var data = {};
if(typeof timestamp!='undefined')
data.timestamp = timestamp;
$.post('longpoll.php',data,function(msg){
var newData = '';
for(i in msg.notifications){
newData+=msg.notifications[i].message+'\n';
}
if(newData!='')
alert(newData);
pullNotification(msg.timestamp);
},'json');
}
</script>
这将检查数据库更新并将其弹出。 每20秒就会更新一次请求。 显然,您必须使其适应您的需求。
我相信您的问题来自缓存的请求(在ajax本身的浏览器中),请尝试禁用ajax缓存:
$(document).ready(function() {
setInterval(function() {
$.ajax({
url: "plugins/notice/n_notice_invoice.php",
cache: false
})
.done(function( data ) {
$('#rtnotice').html(data).fadeIn("slow");
});
}, 5000)
});
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