getMessages.php

<?php


$conn = new mysqli("localhost", "example", "password", "yourDB");



// Check connection



if ($conn->connect_error) {



    die("Connection failed: " . $conn->connect_error);


}

$rid=$_POST["room_id"];

$sql ="SELECT * from Messages where rid='$rid'";

$result = $conn->query($sql);


$rooms= array();

while($row = $result->fetch_assoc())
{
	$obj= array();
	array_push($obj,$row['uid']);
	array_push($obj,$row['rid']);
	array_push($obj,$row['message']);
	array_push($obj,$row['username']);
	
	
	array_push($rooms,$obj);

}
echo json_encode($rooms);
	

?>