<form method="" class="form-horizontal" action="#">
                                <div class="form-group">
                                    <label class="col-sm-2 control-label">Select Date</label>
                                    <div class="input-daterange input-group col-sm-5">
                                        <input type="text" class="input-sm form-control" name="start" id="start" placeholder="select date from">
                                        <span class="input-group-addon">to</span>
                                        <input type="text" class="input-sm form-control" name="end" id="end" placeholder="select date to">
                                    </div>
                                </div>
                                <div class="hr-line-dashed"></div>
                                <div class="form-group">
                                    <label class="col-sm-2 control-label">Search With</label>
                                    <div class="col-sm-5">
                                        <?php 
$db = new Database();
$employees = $db->getAllUser();
?>
                                        <select class="form-control" name="employee_name" id="employee_name">
                                            <option>Search By Employee</option>
                                            <?php 
foreach ($employees as $user) {
    echo "<option value='{$user['username']}'>{$user['username']}</option>";
}
?>
                                        </select>
                                    </div>
                                </div>
                                <div class="hr-line-dashed"></div>
                                <div id="no_print5" class="form-group">
                                    <div class="col-sm-4 col-sm-offset-2">
                                        <button class="btn btn-primary" name="btn_search_sales_details" id="btn_search_sales_details" type="button">Search</button>