如何通过单击按钮激活PHP包括？

I am working on an admin panel in php.

My idea is to add a store in the admin panel and it should add the store in database.In the admin panel after submitting it should show the 4 buttons as shown in figure!

for this i have written some html ,but main problem is if i click on show stores it should add a php include and show below like this enter image description here But the problem is without clicking on show stores the php iclude is default enable.Please help me to include the php file only if i press the show stores button.

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- Database connection is created with the db AskCoupon.com -->
<?php
//Step1
 if ( ! empty( $_POST ) ) {

  // Connect to MySQL
  $mysqli = new mysqli( 'localhost', 'root', 'sai123', 'askcoupon.com' );

  // Check our connection
  if ( $mysqli->connect_error ) {
    die( 'Connect Error: ' . $mysqli->connect_errno . ': ' . $mysqli->connect_error );
  }
  /*New Code added here*/
  $storeName = $_POST['store_name'];

  $check=mysqli_query($mysqli,"select * from featured_stores where store_name='$storeName'");
    $checkrows=mysqli_num_rows($check);
   if($checkrows>0){echo "customer exists";}  
else{  
    //insert results from the form input
    $query = "INSERT INTO featured_stores ( store_id, store_name,no_of_coupons,caption ) VALUES ( '{$mysqli->real_escape_string($_POST['store_id'])}', '{$mysqli->real_escape_string($_POST['store_name'])}', '{$mysqli->real_escape_string($_POST['no_of_coupons'])}', '{$mysqli->real_escape_string($_POST['caption'])}' )";
    // $insert = $mysqli->query($sql);
    $result = mysqli_query($mysqli, $query) or die('Error querying database.');

    mysqli_close($mysqli);
    echo "Store Added";
    }

  };

?>
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Admin Panel</title>
</head>
<body>
<div class="container">
  <div class="row">
    <div class="col-xs-3 col-sm-3 col-md-3 col-lg-3">
    <a class="btn btn-primary" href="../admin_panel" role="button">Insert Another Store</a>
    </div>
    <div class="col-xs-3 col-sm-3 col-md-3 col-lg-3">
     <a class="btn btn-danger" href="../admin_panel" role="button">Insert Another Coupon</a>
    </div>
    <div class="col-xs-3 col-sm-3 col-md-3 col-lg-3">
    <a class="btn btn-success" href="../Admin_panel/show_stores.php" role="button" onclick="loadThis">Show Stores</a>
    </div>
    <div class="col-xs-3 col-sm-3 col-md-3 col-lg-3">
    <button  class="btn btn-success" href="#" role="button" onclick="loadThis">Show Coupons</button>
    </div>
  </div>
</div>

<script>
function loadThis(){
<?php include'show_stores.php';?>
}
</script>

</body>
</html>

Also I am including showstores.php file here

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<?php
// 1) connect to the database by mysql_connect()

mysql_connect("localhost", "root", "sai123") or die(mysql_error()); 
// 2) than select the database like  mysql_select_db()

mysql_select_db("askcoupon.com") or die(mysql_error()); 
// 3) you need to use mysql_query()

$data = mysql_query("SELECT * FROM featured_stores where 1")  or die(mysql_error());
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Admin Panel</title>

</head>
<body>
<div class="container">
<div class="row well">
<?php
while($row= mysql_fetch_array( $data )){ ?>
    <div class="col-xs- col-sm- col-md-2 col-lg-">
        <?php echo $row['store_id']; ?> 
    </div>
    <div class="col-xs- col-sm- col-md-4 col-lg-">
        <?php echo $row['store_name'] ?>                                        
    </div>
    <div class="col-xs- col-sm- col-md-3 col-lg-">
        <?php echo $row['no_of_coupons'] ?>
    </div>
    <div class="col-xs- col-sm- col-md-3 col-lg-">
        <?php echo $row['caption'] ?>
    </div>
    <?php } ?>
</div>
</div> 
</body>
</html>

Console Log after answer 1 enter image description here

there are many options, one of which include sending ajax request, in this situation very simple example you can create new include.php file

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>    


function loadThis() { 
    $.ajax({              
        type: "POST",
        url: "include.php",
        dataType: "html",
        success: function(data) {}
    });
}


/* include.php file */
<?php
include('showstores.php');
?>