Please help... am working on a form within as html page that export my SQL table to excel and download it. but i have been experience error
Anythime i click the Export to excel button it keep taking me to a new page instead of export data to excel. Below is my form and the excel.php script
Form
<form method="post" action="sites/erp/ajaxify/excel.php">
    <div id="content">
        <div class="col-md-4 col-md-offset-4 text-center">
                <div class="form-group">
                    <button id="exportbtn" class="btn btn-lg btn-success btn-block">  Export to Excel </button>
                </div>  
        </div>
    </div>
</form>
and the Excel.php
if(isset($_REQUEST['tablename']) && isset($_REQUEST['keyy'])){
$tablename = use_if_sent('tablename');
$result = $ez_db->query("SELECT `firstname`, 'lastname', 'email', 'gender', 'user_group', 'phone', status' FROM 'signup'");
 if(mysql_num_rows($result) > 0)
{
        $output .= '
        <table class="table" bordered="1">  
            <tr>  
                <th>First name</th>
                <th>Lastname</th>
                <th>Email</th>
                <th>Gender</th>
                <th>Department</th>
                <th>Phone</th>
                <th>Status</th>
            </tr>
        ';
        while($row = mysql_fetch_array($result))
        {
           $output .= '
            <tr>  
                <td>'.$row["firstname".'</td>  
                <td>'.$row["lastname"].'</td>  
                <td>'.$row["email"].'</td>  
                <td>'.$row["gender"].'</td>  
                <td>'.$row["user_group"].'</td>
                <td>'.$row["phone"].'</td>
                <td>'.$row["status"].'</td>
            </tr>
           ';
        }
      $output .= '</table>';
      header('Content-Type: application/xls');
      header('Content-Disposition: attachment; filename=download.xls');
      echo $output;
    }  
}
?>
 
     
     
    