I need to give a javascript alert to users browser when a new record is added to database. So far i have done this:
PHP chatalert.php
require("../system/config.php");
$result = mysql_query("SELECT * FROM chat");
$rows = mysql_num_rows($result);
echo $rows;
Javascript: test.php
<?php
define('BASEPATH', true);
require("../system/config.php");
?>
<script>
var old_count = 0;
setInterval(function(){
$.ajax({
type : "POST",
url : "chatalert.php",
success : function(data){
if (data > old_count) {
alert('new record on i_case');
old_count = data;
}
}
});
},1000);
</script>
But I always recive an error: "Uncaught ReferenceError: $ is not defined". So I will need some advice on this.
Mairo
Have you included jquery? if not try adding this in your head tags
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
also make sure to parse the string to integer/Float for accurate result. The data returned by php can also be in string format:
var old_count = 0;
setInterval(function(){
$.ajax({
type : "POST",
url : "chatalert.php",
success : function(data){
if (parseFloat(data) > old_count) {
alert('new record on i_case');
old_count = data;
}
}
});
},1000);
Related
Here is my little script code I want to get data from codeingiter controller. I get json data from controller to view ajax, but It print with html page code.
any one can help me here, How can I solve this.
I only want to get json data ans a variable data to my page.
this is output that I am getting but this is comming with html code and I don't want html code.
[{"id":"1","p_name":"t_t11","p_type":"t_t1","paid_type":"0"},{"id":"2","p_name":"t_t12","p_type":"t_t1","paid_type":"1"},{"id":"3","p_name":"t_t1","p_type":"t_t1","paid_type":"0"}]
I have follow some question answers but can't et success, because that question's answers not related to me.
Link 1
Link 2 and many more...
<script>
$("a.tablinks").on('click',function(e){
e.preventDefault();
var p_name = $(this).attr('value');
alert(p_name);
$.ajax({
url:"<?php echo base_url(); ?>teq/gettabdata",
dataType:'text',
type: "POST",
data:{p_name : p_name},
success : function(data){
alert(data);
if(data !=""){
var obj = JSON.parse(data);
alert(obj.id);
/*$.each(obj, function(key,val){
console.log(key);
console.log(val); //depending on your data, you might call val.url or whatever you may have
});*/
}else{
alert(data+ '1');
}
},
error : function(data){
//var da = JSON.parse(data);
alert(data+ '2');
//alert(da+ '2 da ');
}
});
});
</script>
Here is controller code.
public function gettabdata(){
$p_name = $this->input->post('p_name');
//echo $p_name." this is paper name.!";
$tabs_data['res1'] = $this->db->distinct()->select('p_type')->from('t_name')->get()->result();
//$p_name = $data;
$query['res'] = $this->db->select('*')->from('t_name')->where('p_type',$p_name)->get()->result();
echo json_encode($query['res']);
$this->load->view('teq', $tabs_data);
}
You added view at the end of your function that return view's code.
Remove line:
$this->load->view('teq', $tabs_data);
You can either use
if ($this->input->is_ajax_request()) {
echo json_encode($data_set);
}else{
//Procced with your load view
}
Or if you're avoiding ajax request check then please pass any extra paramter from your ajax call then then check for its existence at your controller and on behalf of it proceed your conditional statement . it will solve your problem
Change your controller method like this:
public function gettabdata(){
$p_name = $this->input->post('p_name');
//echo $p_name." this is paper name.!";
$tabs_data['res1'] = $this->db->distinct()->select('p_type')->from('t_name')->get()->result();
//$p_name = $data;
$query['res'] = $this->db->select('*')->from('t_name')->where('p_type',$p_name)->get()->result();
// if ajax request
if ($this->input->is_ajax_request()) {
echo json_encode($query['res']);
return; // exit function
}
$this->load->view('teq', $tabs_data);
}
In your ajax code chage dataType: to json
$.ajax({
url:"<?php echo base_url(); ?>teq/gettabdata",
dataType:'json',
type: "POST",
data:{p_name : p_name},
success : function(res)
{
if(res !=""){
alert(res.id);
}else{
alert(res+ '1');
}
}
});
And in your controller
public function gettabdata()
{
if($this->input->post('p_name'))
{
$p_name = $this->input->post('p_name');
$query['res'] = $this->db->select('*')->from('t_name')->where('p_type',$p_name)->get()->result();
if($query['res'])
{
$resp = $query['res'];
}
else
{
$resp = array('status' => FALSE,'msg' => 'Failed');
}
echo json_encode($resp);
}
else
{
$tabs_data['res1'] = $this->db->distinct()->select('p_type')->from('t_name')->get()->result();
$this->load->view('teq', $tabs_data);
}
}
Hope this helps :)
I'm designing an admin panel full Ajax and i have a problem...
In a Page i select information db with ajax like this :
html
<body>
<div id="loadbox"></div>
<script src="jquery.js"></script>
<script src="script.js"></script>
</body>
js
$(document).ready(function() {
show_all();
});
function show_all() {
work = "select";
$.ajax({
type: "POST",
url: "server.php",
data: "work=" + work,
success: function(data) {
$("#loadbox").html(data);
}
});
}
and server.php file :
$pdo = new PDO('mysql:host=localhost;dbname=test','root','');
if(isset($_POST['work'])){
$work = $_POST['work'];
if ($work == 'select') {
$query = $pdo->query("SELECT * FROM t1");
while ($s = $query->fetch()) {
$name = $s['name'];
$family = $s['family'];
echo '<div id="xRight">'.$name.'</div>';
echo '<div id="xLeft">'.$family.'</div><br>';
}
}
}
Now I need to use the id xRight for this cod :
$("#xRight").click(function(){
$(this).addClass("vv");
});
But because div and id made in server.php file . id to be not found for use
How can I fix this problem ?!
i think it's working for you
$(document).on("click","#xRight",function(event) {
// $(this).addClass("vv");
$(event.target).addClass("vv");
});
Try This
$("#parent_container_of_xRight").on('click','#xRight',function(){
//my cod js
});
Write the code :-
$("#xRight").click(function(){
//my cod js
});
inside document.ready function . For example :-
$( document ).ready(function() {
$("#xRight").on("click",function(){
//my cod js
});
});
I have a case where I want to pass a variable inside a function.
The code gives more clarity:
<?php
$id=$_POST['id'];
echo "
<script type=\"text/javascript\">
$(document).ready(function(){
function loadData(page){
$.ajax({
type: \"POST\",
url: \"loadSubscritor.php\",
dataType: \"html\",
data: ({ page:page }),
success: function(msg) {
$(\"#subscritor #container\").ajaxComplete(function(event, request, settings) {
$(\"#subscritor #container\").html(msg);
});
},
error: function(){
alert('alertErr');
}
});
}
loadData(1); // For first time page load default results
$('#subscritor #container .pagination li.active').live('click',function() {
var page = $(this).attr('p');
loadData(page);
});
$('#subscritor #go_bt').live('click',function() {
var page = parseInt($('.goto').val());
var no_of_pages = parseInt($('.total').attr('a'));
if(page != 0 && page <= no_of_pages){
loadData(page);
}else{
alert('Enter a PAGE between 1 and '+no_of_pages);
$('.goto').val(\"\").focus();
return false;
}
});
});
</script>
<h3>Subscritor</h3>
<div id=\"subscritor\">
<div id=\"container\">
<div class=\"pagination\"></div>
</div>
</div>";
?>
As shown in the code,
I would like to know how could I pass $id inside the loadData(page) function .
I get this variable from a post request made with ajax, and need to use it inside the function to pass it has variable to loadSubscritor.php
Any idea on how to do it?
EDIT 1: I guees I wasnt very clear on what I wanted, i want to do this :
function loadData(page){
$.ajax({
data: ({ page:page id:$id }),
Thanks in advance.
Well, if I understood what you are trying to achieve you could replace this :
$id=$_POST['id'];
By this :
$id = isset($_POST['id']) ? $_POST['id'] : 1;
And this :
loadData(1); // For first time page load default results
By this :
loadData($id);
For explanation, if it's first time page load, $id will be set to "1".
Else, this will come from $_POST['id'].
Inside your jquery code you can call a php variable in following way
var current_page = "<?php echo $id; ?>" ;
You can make a local variable and easily use as below:
<?php
$id=$_POST['id'];
echo "
<script type=\"text/javascript\">
var id = \"".$id."\";
$(document).ready(function(){
function loadData(page){
$.ajax
({
type: \"POST\",
url: \"loadSubscritor.php\",
dataType: \"html\",
data: ({ page:page
}),
success: function(msg)
{
$(\"#subscritor #container\").ajaxComplete(function(event, request, settings)
{
$(\"#subscritor #container\").html(msg);
});
},
error:
function()
{ alert('alertErr');
}
});
}
loadData(1); // For first time page load default results
$('#subscritor #container .pagination li.active').live('click',function(){
var page = $(this).attr('p');
loadData(id);
});
$('#subscritor #go_bt').live('click',function(){
var page = parseInt($('.goto').val());
var no_of_pages = parseInt($('.total').attr('a'));
if(page != 0 && page <= no_of_pages){
loadData(id);
}else{
alert('Enter a PAGE between 1 and '+no_of_pages);
$('.goto').val(\"\").focus();
return false;
}
});
});
</script>
<h3>Subscritor</h3>
<div id=\"subscritor\">
<div id=\"container\">
<div class=\"pagination\"></div>
</div>
</div>
";
?>
I'm trying to create a small chat application but for the sake of minifying the bytes being transferred is there any other way on writing this javascript that is less heavy than this code?
Here is my javascript:
function sendChatText() {
if (sendReq.readyState == 4 || sendReq.readyState == 0) {
sendReq.open("POST", 'includes/getChat.php?last=' + lastMessage, true);
sendReq.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
sendReq.onreadystatechange = AjaxRetrieve();
var param = 'message=' + document.getElementById('txtA').value;
param += '&name='+user;
param += '&uid='+uid;
param += '&rid='+document.getElementById('trg').value;
sendReq.send(param);
document.getElementById('txtA').value = '';
}
}
Can this also be done on a JSON format too? because I think some says that json is lighter.. not sure though
here is my php code
$con = new PDO("mysql:host=". db_host .";dbname=chat_db", db_username , db_password);
$con->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
$sql = "SELECT * FROM users WHERE id = :rid LIMIT 1";
$stmt=$con->prepare($sql);
$stmt->bindValue( 'rid',$_POST['rid'], PDO::PARAM_STR);
$stmt->execute();
foreach($stmt->fetchAll()as $res)
{
$usern = $res['username'];
$user_lvl = $res['ulvl'];
}
$text=$_POST['message'];
$sql4 = "INSERT INTO $tblname2(msgid,username,message_content,message_time,recipient)VALUES(:aid,:a,:b,NOW(),:c) ";
$stmt5 = $con2->prepare($sql4);
$stmt5->bindParam(':aid',$tblpre,PDO::PARAM_STR);
$stmt5->bindParam(':a',$_POST['name'],PDO::PARAM_STR);
$stmt5->bindParam(':b',$text,PDO::PARAM_STR);
$stmt5->bindParam(':c',$usern,PDO::PARAM_STR);
$stmt5->execute();
As user2401175 saies. Why not use a framework, thats what they are here for.
jQuery is really simple and easy to understand.
You could try adding this, just before your "" tag.
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
Under this include of jQuery, you may now use the jQuery Post method to do your ajax request.
In html Use
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
then Create javascript object like this
var changePacket = {
date1:value1,
data2:value2
}
And send Ajax request
$.ajax({
url: "phpFile.php",
dataType: 'json',
type: 'POST',
data: {json:JSON.stringify(changePacket)},
success: function(response) {
alert('hip hip hurray');
},
error: function(response) {
alert('some thing wrong happend');
}
});
In php
$json = $_POST['json'];
$data = json_decode($json);
now user your variable like this $date->data1 and $date->data2
hey guys i read some of the other posts and tried alot but its still not working for me.
when i alert the array i get all the results on the first site but after sending the data to php i just get an empty result. any ideas?
$(document).ready(function() {
$('#Btn').click(function() {
var cats = [];
$('#cats input:checked').each(function() {
cats.push(this.value);
});
var st = JSON.stringify(cats);
$.post('foo.php',{data:st},function(data){cats : cats});
window.location = "foo.php";
});
});
Php
$data = json_decode($_POST['data']);
THANK YOUU
my array looks something like this when i alert it house/flat,garden/nature,sports/hobbies
this are a couple of results the user might choose (from checkboxes).
but when i post it to php i get nothing. when i use request marker (chrome extension) it shows me something likethat Raw data cats=%5B%22house+themes%22%2C%22flat+items%22%5D
i also tried this way-- still no results
$(document).ready(function() {
$('#Btn').click(function() {
var cats = [];
$('#cats input:checked').each(function() {
cats.push(this.value);
alert(cats);
$.ajax({
type: 'POST',
url: "foo.php",
data: {cats: JSON.stringify(cats)},
success: function(data){
alert(data);
}
});
});
window.location = "foo.php";
});
});
php:
$json = $_POST['cats'];
$json_string = stripslashes($json);
$data = json_decode($json_string, true);
echo "<pre>";
print_r($data);
its drives me crazy
Take this script: https://github.com/douglascrockford/JSON-js/blob/master/json2.js
And call:
var myJsonString = JSON.stringify(yourArray);
so now your code is
$(document).ready(function() {
$('#Btn').click(function() {
var cats = [];
$('#cats input:checked').each(function() {
cats.push(this.value);
});
var st = JSON.stringify(cats);
$.post('foo.php',{data:st},function(data){cats : cats});
// window.location = "foo.php"; // comment this by this page redirect to this foo.php
});
});
//and if uou want toredirect then use below code
-------------------------------------------------
$.post('foo.php',{data:st},function(data){
window.location = "foo.php";
});
---------------------------------------------------
Php
$data = json_decode($_POST['data']);
var ItemGroupMappingData = []
Or
var ItemGroupMappingData =
{
"id" : 1,
"name" : "harsh jhaveri",
"email" : "test#test.com"
}
$.ajax({
url: 'url link',
type: 'POST',
dataType: "json",
data: ItemGroupMappingData,
success: function (e) {
// When server send response then it will be comes in as object in e. you can find data //with e.field name or table name
},
error: function (response) {
//alert(' error come here ' + response);
ExceptionHandler(response);
}
});
Try this :-
$data = json_decode($_POST['data'], TRUE);
I think you should move the "window.location = " to the post callback, which means it should wait till the post finshed and then redirect the page.
$.post('foo.php', {
data : st
}, function(data) {
window.location = "foo.php";
});