<?php
    if (!isset($_POST['name']) || !isset($_POST['message'])) die("NOT OK");
    header('Content-Type: application/json');
    $name = $_POST['name'];
    $name = mysql_real_escape_string($name);
    $message = $_POST['message'];
    $message = mysql_real_escape_string($message);
    $ip = $_SERVER['REMOTE_ADDR'];
    $datetime = date("o-n-t H:i:s");
    $timestamp = time();
    $query = "SELECT id FROM chat";
    $result = mysql_query($query);
    $num_rows = mysql_num_rows($result);
    if ($num_rows >= 50) {
        $query = "DELETE FROM chat ORDER BY id ASC LIMIT 1";
        $result = mysql_query($num_rows);
    }
    $query = "INSERT INTO chat (timestamp,ip_address,datetime,username,message) VALUES ('$timestamp','$ip','$datetime','$name','$message')";
    $result = mysql_query($query);
    if($result){
        echo "OK";
    }else{
        echo "NOT OK";
    }
?>