while loop returing last loop repeating each time - php

Question

I am trying to make a messaging system in PHP in a dinky little app I'm making in android. I've gotten it mostly sorted out but there Is 1 problem I cant seem to fix. in my messaging system I want to display all the conversations the user has with other users along with the last text sent or received like on most messaging systems. the problem I am having is that the PHP script I made to get and displays all the conversation displays the last message for one user over and over again, for all the conversation the user has ongoing. see below
this is what my message table looks like, note it is supposed to get and display only the last text sent or recived, it does this but it only for 1 user but it displays it for both. if I had 3 or more texts from or to peter it would look the same but if I messaged another user it would display 3 texts
here is my code.
<?php
$pdo = new PDO("mysql:host=localhost;dbname=basicbook;charset=utf8mb4", 'root', '', [
\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION,
\PDO::ATTR_EMULATE_PREPARES => false
]);
require_once "basicbookconfig.php";
error_reporting(E_ALL);
ini_set('display_errors', 1);
$conn->set_charset('utf8mb4'); // always set the charset
if($_SERVER["REQUEST_METHOD"] == "POST") {
$f = file_get_contents('php://input');
$jsonobj = stripslashes($f);
$obj = json_decode($jsonobj);
$email = $obj[0];
// step 1 get id from email
$sql0 = "SELECT `id` FROM `users` WHERE email = ?";
$stmt0 = $conn->prepare($sql0);
$stmt0->bind_param("s", $email);
$stmt0->execute();
$stmt0->store_result();
if($stmt0->num_rows == 1) {
$stmt0->bind_result($id);
$stmt0->fetch();
// step 2 get chats off all people with that id
$stmt = $pdo->prepare("SELECT `person1`, `person2` FROM `chats` WHERE `person1` = ? or `person2` = ?");
$stmt->execute([$id,$id]);
$return22 = array();
while ($row = $stmt->fetch()) {
$person1 = $row["person1"];
$person2 = $row["person2"];
// echo $person1;
// echo $person2;
// echo "here";
// I expect it to do this twice
$stmt2 = $pdo->prepare("SELECT `message_id`, `user_to`, `user_from`, `message` FROM `messages` WHERE `user_to` = ? or ? and `user_from` = ? or ? ORDER BY message_id DESC LIMIT 1");
$stmt2->execute([$person1,$person2, $person1,$person2]);
while ($results = $stmt2->fetch()) {
$message_id = $results["message_id"];
$user_to = $results["user_to"];
$user_from = $results["user_from"];
$message = $results["message"];
if ($user_to == $id) {
$friend = $user_from;
} elseif ($user_from == $id) {
$friend = $user_to;
} else {
echo "there is a problem1";
}
$sql3 = "SELECT `name` FROM `users` WHERE `id` = ?";
$stmt3 = $conn->prepare($sql3);
$stmt3->bind_param("s", $friend);
$stmt3->execute();
$stmt3->store_result();
$stmt3->bind_result($name);
$stmt3->fetch();
$return22[] = array('message_id'=>$message_id, 'otherperson'=>$name, 'message'=>$message);
}
$b = array("my_messages" => $return22);
}
echo json_encode($b);
}
}
I have been trying varius fixes for a while now. anyways I hope it makes sense what I am trying to do. thank you and have a nice day, if you have any questions please ask.