HTML FILE:
<form method="POST" action="../../php/AddLead.php">
   <div class="form-group">
     <label>Customer Comment</label>
     <textarea class="form-control" rows="2" name="lead_comment"></textarea>
   </div>
   <div class="form-group">
     <label>Admin Comment</label>
     <textarea class="form-control" rows="2" name="lead_admin_comment"></textarea>
   </div>
   <button type="submit" class="btn btn-default" id="addnewlead">Submit Details</button>
   <button type="reset" class="btn btn-default">Reset Fields</button>
</form>

PHP FILE:

<?php
    session_start();

    $servername = "localhost";
    $username = "username";
    $password = "password";
    $dbname = "myDB";

    $conn = new mysqli($servername, $username, $password, $dbname);

    if ($conn->connect_error) {
       die("Connection failed: " . $conn->connect_error);
    } else {

        $lead_comment = mysqli_real_escape_string($conn, $_POST['lead_comment']);

        $admin_comment = mysqli_real_escape_string($conn, $_POST['lead_admin_comment']);

        $insert_query = "INSERT INTO `LeadTB` (`date`,`lead_comment`,`lead_admin_comm`)
                            VALUES (CURDATE(),'" . $lead_comment . "','" . $admin_comment. "')";

        if($conn->query($insert_query) === TRUE) {
            if($_SESSION['position'] == 'Marketing') {
                echo "<script>alert('Lead created successfully!');window.location.href='../Pages/Marketing/Leads.php';</script>";
            } elseif($_SESSION['position'] == "Lead Admin") {
                echo "<script>alert('Lead created successfully!');window.location.href='../Pages/Lead-Admin/Leads.php';</script>";
            } else {
                echo "<script>alert('You do not have access to the Marketing profile! Please contact an administrator.');window.location.href='../Pages/LoginError.html;</script>";
            }

        } else {
            if($_SESSION['position'] == "Marketing") {
                echo "<script>alert('There was a problem with the lead creation process. Please try again.');window.location.href='../Pages/Marketing/Add-New-Lead.php';</script>";
            } else {
                echo "<script>alert('There was a problem with the lead creation process. Please try again.');window.location.href='../Pages/Lead-Admin/Add-New-Lead.php';</script>";
            }
        }
    }
    $conn->close();
}