fetch.php

<?php
	session_start();
	include "connection.php";
	$uname=$_SESSION['username'];
  if (isset($_SESSION['to_name'])) {
	$rname=$_SESSION['to_name'];
	$q="select * from messenger where 1; ";
	$res=mysqli_query($conn,$q);
		while($row = mysqli_fetch_array($res))
           {
           		if($row['from_name']==$uname && $row['to_name']==$rname)
           		{?>
           			<div class="sent">
           			<?php echo $row['message']; ?>
           			</div>
           		<?php
           		}	
           		if($row['from_name']==$rname &&
           			$row['to_name']==$uname)
           		{?>
           			<div class="received">
           			<?php echo $row['message']; ?>
           			</div>
           		<?php	
           		}
           }
      }
       else
      {echo "click on username to chat";}
    ?><br>