PHP Chat App

PHP'de framework kullanmadan real-time chat-app nasıl yapabilirim?
txt dosyasından okuyarak yapabilir miyim?

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="" method="post">
        <input type="text" name="asdd" id="aaaa">
        <input type="submit" value="asd" name="sss">
    </form>
    <?php
        if(isset($_POST['sss'])){
            $name = $_POST['asdd'];
            if(!empty($name)){
                $file = fopen("messages.txt", "a");
                fwrite($file, $name. "n");
                fclose($file);
                $count = 1;
                $read = file("messages.txt");
                $read_count = count($read);
                foreach($read as $read){
                    echo trim("<p color='red'>'$read'</p>"."<br>");
                    $name = "";
                }
            }
            else{
                echo "nope";
            }
        }
    ?>
</body>
</html>

Bunun gibi.