I'm trying to edit the data from the html table, each row has an edit link that redirects the user to the form to edit the row.
the problem is that the database did not update when the form is submitted
it redirected me back to the editest.php 
editest.php
    <?php
include('dbconn.php');
$query = "SELECT * FROM tbl_locators WHERE accholder_ID='1'";
$result = mysqli_query($con, $query);
?>
<!DOCTYPE html>
<html>
    <head>
            <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <link rel="stylesheet" href="/Cisu/css/footable.core.css">
        <link rel="stylesheet" href="/Cisu/css/footable.metro.css">
        <script src="https://code.jquery.com/jquery-1.11.3.js"></script>
        <script src="/Cisu/javascript/jquery/footable.js"></script>
        <script src="/Cisu/javascript/jquery/footable.paginate.js"></script>  
        <script src="/Cisu/javascript/jquery/footable.filter.js"></script>  
        <link rel="stylesheet" href="/Cisu/css/search.css" type="text/css" media="screen"/>
        <link rel="stylesheet" href="/Cisu/css/footable.editable-1.0.css" type="text/css" media="screen"/>
    </head>
    <body>
        <div id="header">
            <img src="/Cisu/images/sbma.png" class="logo" id="logo"></img>
            <a style = "float:left;">Account Settings</a>
            <a href="#">Home</a>
            <a href="#">Locators</a>
        </div>
        <div id="navigation">
                        <ul class="ul-sidebar">
                <li class="li-sidebar">
                    <a class="active">View Locators</a>
                </li>
            </ul>
        <form class="form-style-1">
        <ul class="ul-sidebar">
        <li class="li-sidebar"> <label class="header-label">Company Name:</label>
            <input type="text" id="filter"/></li>
</select>
        </ul>
        </form>
        </div>
        <div id="section">
            <table class="footable" data-page-size="10" data-filter="#filter" data-filter-minimum="4"  data-first-text="FIRST" data-next-text="NEXT" data-previous-text="PREVIOUS" data-last-text="LAST">
            <thead>
            <tr>
                <th>ID</th> 
                <th>Company Name</th> 
                <th>Nationality</th> 
                <th>Primary Address</th> 
                <th>Industry Code</th>
                <th>TIN</th> 
                <th>Status</th> 
                <th>Employees</th>
                <th>Account Holder ID</th>
                <th>EDIT</th> 
            </tr>
            </thead>
            <tbody>
                <!-- populate table from mysql database -->
            <?php while($row1 = mysqli_fetch_array($result)):;?>
            <tr>
                <td><?php echo $row1['locators_ID'];?></td>
                <td><?php echo $row1['locators_CompanyName'];?></td>
                <td><?php echo $row1['locators_Nationality'];?></td>
                <td><?php echo $row1['locators_PrimaryAddress'];?></td>
                <td><?php echo $row1['locators_IndustryCode'];?></td>
                <td><?php echo $row1['locators_TIN'];?></td>
                <td><?php echo $row1['locators_Status'];?></td>
                <td><?php echo $row1['locators_Employees'];?></td>
                <td><?php echo $row1['accholder_ID'];?></td>
                <?php echo '<td><a href="editlocator.php?locators_ID=' . $row1[0] . '">Edit</a></td>'; ?>
            </tr>
            <?php endwhile;?>
            </tbody>
            <!-- the pagination -->
            <!-- hide-if-no-paging = hide the pagination control -->
            <tfoot class="hide-if-no-paging">
            <td colspan="9">
                <div class="pagination"></div>
            </td>
            </tfoot>
        </table>
    <script type="text/javascript">
       $(document).ready(function(){
           $('.footable').footable();
       });
    </script>
        </div>
        <div id="footer">
            S.B.M.A Centralized Information System 
        </div>
    </body>
    </html>
editlocator.php
   <?php
include("dbconn.php");
function renderForm($id = '', $accid = '', $companyname = '', $nationality = '', $primaryaddress = '', $industrycode = '', $tin = '', $status = '', $employees = '')
{
?>
<html>
    <head>
        <link rel="stylesheet" href="css/add.css" type="text/css" media="screen"/>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
        <Title>
        EDIT
        </title>
    </head>
    <body>
        <div id="header">
            <img src="images/sbma.png" class="logo" id="logo"></img>
            <a style = "float:left;">Account Settings</a>
            <a href="AdminMenu.php">Home</a>
            <a href="DeptMenu.php">Department</a>
        </div>
        <div id="navigation">
                </ul>
        </div>
        <div id="section">
        <h1>EDIT</h1>
            <form class="form-style-1" action="" method="post">
             <ul>
                <fieldset class="fieldset-company">
                <input type="hidden" name="locators_ID" value="<?php
    echo $id;
?>" />
                <p>ID: <?php
    echo $id;
?></p>    
                <input type="hidden" name="accholder_ID" value="<?php
    echo $accid;
?>" />
                <p>Account ID: <?php
    echo $accid;
?></p>  
                    <li>
                        <label>Company Name</label>
                        <input type='text' name='companyname' id='companyname' maxlength="50" value="<?php
    echo $companyname;
?>"/>
                    </li>               
                    <li>
                        <label>Nationality</label>
                        <input type='text' name='nationality' id='nationality' maxlength="50" value="<?php
    echo $nationality;
?>"/>
                    </li>
                    <li>
                        <label>Primary Address</label>
                        <input type='text' name='primaryaddress' id='primaryaddress' maxlength="50" value="<?php
    echo $primaryaddress;
?>"/>
                    </li>
                    <li>
                        <label>Industry Code:</label>
                        <input type='text' name='industrycode' id='industrycode' maxlength="50" value="<?php
    echo $industrycode;
?>"/>
                    </li>
                    <li>
                        <label>TIN:</label>
                        <input type='text' name='tin' id='tin' maxlength="50" value="<?php
    echo $tin;
?>"/>
                    </li>
                    <li>
                        <label>Status:</label>
                        <input type='text' name='status' id='status' maxlength="50" value="<?php
    echo $status;
?>"/>
                    </li>
                    <li>
                        <label>Employees:</label>
                        <input type='text' name='employees' id='employees' maxlength="50" value="<?php
    echo $employees;
?>"/>
                    </li>
                    </fieldset>
                         <li>
                      <input type='Submit' name='Submit' value='Submit' />
                         </li>
            </form>
        </div>
        <div id="footer">
    S.B.M.A Centralized Information System 
    </div>
    </body>
</html>
<?php
}
if (isset($_GET['locators_ID'])) {
    // if the form's submit button is clicked, we need to process the form
    if (isset($_POST['Submit'])) {
        // make sure the 'id' in the URL is valid
        if (is_numeric($_POST['locators_ID'])) {
            // get variables from the URL/form
            $id             = $_POST['locators_ID'];
            $accid          = htmlentities($_POST['accholder_ID'], ENT_QUOTES);
            $companyname    = htmlentities($_POST['companyname'], ENT_QUOTES);
            $nationality    = htmlentities($_POST['nationality'], ENT_QUOTES);
            $primaryaddress = htmlentities($_POST['primaryaddress'], ENT_QUOTES);
            $industrycode   = htmlentities($_POST['industrycode'], ENT_QUOTES);
            $tin            = htmlentities($_POST['tin'], ENT_QUOTES);
            $status         = htmlentities($_POST['status'], ENT_QUOTES);
            $employees      = htmlentities($_POST['employees'], ENT_QUOTES);
            // check that companyname and primaryaddress are both not empty
            if ($companyname == '' || $primaryaddress == '') {
                // if they are empty, show an error message and display the form
                echo "Blank Page";
                renderForm($accid, $id, $companyname, $nationality, $primaryaddress, $industrycode, $tin, $status, $employees);
            } else {
                // if everything is fine, update the record in the database
                if ($stmt = $con->prepare("UPDATE tbl_locators SET locators_CompanyName = ?, locators_Nationality = ?, locators_PrimaryAddress= ?, locators_IndustryCode = ?, locators_TIN = ?, locators_Status= ?, locators_Employee = ?
WHERE locators_ID= ?")) {
                    $stmt->bind_param("sssssssii", $companyname, $nationality, $primaryaddress, $industrycode, $tin, $status, $employees, $id);
                    $stmt->execute();
                    if (!$stmt = $con->prepare("UPDATE tbl_locators SET locators_CompanyName = ?, locators_Nationality = ?, locators_PrimaryAddress= ?, locators_IndustryCode = ?, locators_TIN = ?, locators_Status= ?, locators_Employee = ?
WHERE locators_ID= ?")){ echo "Execute failed: (" . $stmt->errno . ") " . $stmt->error; }
                else if (!$stmt->execute()) { echo "Execute failed: (" . $stmt->errno . ") " . $stmt->error; }
                else if (!$stmt->bind_param("sssssssi", $companyname, $nationality, $primaryaddress, $industrycode, $tin, $status, $employees, $id)) { echo "Bind Param failed: (" . $stmt->errno . ") " . $stmt->error; }
                }
                // show an error message if the query has an error
                else {
                    echo "ERROR: could not prepare SQL statement.";
                }
                // redirect the user once the form is updated
                header("Location: editest.php");
            }
        }
        // if the 'id' variable is not valid, show an error message
        else {
            echo "Error!";
        }
    }
    // if the form hasn't been submitted yet, get the info from the database and show the form
    else {
        // make sure the 'id' value is valid
        if (is_numeric($_GET['locators_ID']) && $_GET['locators_ID'] > 0) {
            // get 'id' from URL
            $id = $_GET['locators_ID'];
            // get the record from the database
            if ($stmt = $con->prepare("SELECT * FROM tbl_locators WHERE locators_ID=?")) {
                $stmt->bind_param("i", $id);
                $stmt->execute();
                $stmt->bind_result($id, $companyname, $nationality, $primaryaddress, $industrycode, $tin, $status, $employees, $accid);
                $stmt->fetch();
                // show the form
                renderForm($id, $accid, $companyname, $nationality, $primaryaddress, $industrycode, $tin, $status, $employees);
                $stmt->close();
            }
            // show an error if the query has an error
            else {
                echo "Error: could not prepare SQL statement";
            }
        }
        // if the 'id' value is not valid, redirect the user back to the view.php page
        else {
            header("Location: editest.php");
        }
    }
}
?>
