Updating Table or div Data using Ajax Codeigniter - php

Question

I am trying to create a page where it shows the current chats done by clients.
Now I am using Openfire as Server, and PHP Ajax for scripting.
Openfire dumps data into MySQL Table.
I retrive all the records using Codeigniter-PHP:
public function get_chats()
{
$this->db->select('*');
$this->db->from('ofMessageArchive');
$query = $this->db->get();
$result = $query->result();
$this->data['messages'] = $result;
$this->data['subview'] = 'dashboard/test';
$this->load->view('_layout_main', $this->data);
}
Now on my view I have table :
<table class="table table-striped table-bordered table-hover" >
<thead>
<th>From</th>
<th>To</th>
<th>Message</th>
<th>Time</th>
</thead>
<tbody>
<?php if(count($messages)): foreach($messages as $key => $message): ?>
<tr>
<td><?php $users = explode("__", $message->fromJID); echo $users[0];?></td>
<td><?php $tousers = explode("__", $message->toJID); echo $tousers[0]; ?></td>
<td><i class="material-icons">play_circle_filled</i>Message</td>
<td><?php echo $date->format('d-m-y H:i:s'); ?></td>
</tr>
<?php endforeach; ?>
<?php endif; ?>
</tbody>
</table>
Now I don't want to reload the whole page instead just refresh the table contents every 5 seconds.
I am using DataTables.
I also thought I could pass json to my view, but I don't know how to update it every 5 seconds.
public function get_chats()
{
$this->db->select('*');
$this->db->from('ofMessageArchive');
$query = $this->db->get();
$result = $query->result();
if (count($result)) {
$response = json_encode($result);
}
else
{
$response = false;
}
echo $response;
}
Also this is going to send new and older messages.
So I only want to append news messages to table old message should be not repeated

Answer 1

Your backend function :
public function get_chats()
{
$this->db->select('*');
$this->db->from('ofMessageArchive');
$query = $this->db->get();
$result = $query->result();
if (count($result)>0) {
$response['status']= true;
$response['messages']= $result;
$response['date']= date("d-m-y H:i:s", strtotime($your-date-here));
}
else
{
$response['status']=false;
}
echo json_encode($response);
}
You have to make javascript function like this :
<script>
function myAJAXfunction(){
$.ajax({
url:'your url here',
type:'GET',
dataType:'json',
success:function(response){
console.log(response);
var trHTML='';
if(response.status){
for(var i=0;i<response.messages.length;i++){
users =response.messages[i]fromJID.slice('--');
touser=response.messages[i]toJID.slice('--');
trHTML=trHTML+
'<tr>'+
'<td>'+users[0]+'</td>'+
'<td>'+touser[0]+'</td>'+
'<td><i class="material-icons">play_circle_filled</i>Message</td>'+
'<td>'+response.date+'</td>'+
</tr>';
}
$('tbody').empty();
$('tbody').append(trHTML);
}else{
trHTML='<tr><td colspan="4">NO DATA AVAILABLE</td></tr>';
$('tbody').empty();
$('tbody').append(trHTML);
}
},
error:function(err){
alert("ERROR LOADING DATA");
}
});
}
// calling above ajax function at every 5 seconds
setInterval(myAJAXfunction,5000);
</script>