Untitled

header.php
<!DOCTYPE html>
<html>
        <head>
                <title>Official MVMS Chromebook Database</title>
                <meta name="description" content="The Chromebook Database used by MVMS, Running MariaDB, PHP, Apache">
                <link rel="stylesheet" type="text/css" href="styles/style1.css">
        </head>
        <body>
                <div id="wrapper-main">
                        <header>
                                <div id="navtotable">
                                        <center>
                                                <a href="table.php">Show Table Of Computers</a>
                                        </center
                                </div>
                                <div id="spacer">
                                </div>
                                <div id="insertform">
                                        <form action="includes/insert.inc.php" method="post">
                                                <center>
                                                <input class="input" type="text" name="roomNum" placeholder="Room Number"></input>
                                                <input class="input" type="text" name="teacher" placeholder="Teacher"></input>
                                                <input class="input" type="text" name="frontID" placeholder="Barcode On Front"></input>
                                                <input class="input" type="text" name="barcode" placeholder="Barcode On Bottom"></input>
                                                <br>
                                                <input class="button" type="submit" name="submit" value="Insert Into Database!"></input>
                                                </center>
                                        </form>
                                </div>
                        </header>
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dbh.inc.php
<?php
$servername = "localhost";
$dBUsername = "root";
$dBPassword = "";
$dBName = "chromebook";

$conn = mysqli_connect($servername, $dBUsername, $dBPassword, $dBName);

if (!$conn) {
 die("Connection Failed: ".mysqli_connect_error());
}
----------------------------------------------------------------------
insert.inc.php
<?php

// added error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

require "dbh.inc.php";

$RoomNum = $_POST["roomNum"];
$Teacher = $_POST["teacher"];
$FrontId = $_POST["frontID"];
$Barcode = $_POST["barcode"];

$sql = "INSERT INTO chrome (RoomNum, Teacher, FrontId, Barcode) VALUES ($RoomNum, $Teacher, $FrontId, $Barcode)";

if ($conn->query($sql) === TRUE) {
 echo "New Laptop Added Successfully";
} else {
 echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();