$ro4 = new database4();
if (isset($_POST['month'])) {
$month = $_POST['month'];
} else {
$month = date("m");
}
if (isset($_POST['year'])) {
$year = $_POST['year'];
} else {
$year = date("Y");
}
$monthWord = array("01" => "January", "02" => "February", "03" => "March", "04" => "April", "05" => "May", "06" => "June", "07" => "July", "08" => "August", "09" => "September", "10" => "October", "11" => "November", "12" => "December");
$totalInvoice = 0;
$from = $year . "-" . $month . "-" . "01";
$to = $year . "-" . $month . "-" . "31";
$ro4->list_retail($from, $to);
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="../../bootstrap-3.3.6/css/bootstrap.css"></link>
</head>
<body>
<div class="container">
<h2>Retail List</h2>
<form method="post" action="view-retail.php">
<div class="col-md-2">
<select class="form-control" name="month">
<option value="<?php
