<?php
  session_start();
  $servername = "localhost";
  $username = "root";
  $pass = "pass";
  $dbName = "Revo";
  $conn = mysqli_connect($servername , $username , $pass , $dbName);

  $checked = $_POST["checked"];
  $player = $_POST["player"];
  $name = $_POST["name"];
  $date = $_POST["date"];

  //echo($checked." ".$player." ".$name." ".$date);
  $updateChecked = $conn->prepare("UPDATE demoCheck
                                   SET checked = ?
                                   WHERE name = ?
                                   AND player = ?
                                   AND date = ?");

  $updateChecked->bind_param("ssss",$checked,$name,$player,$date);

  $updateChecked->execute();

  $conn->close();
?>