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DatabasesPhase2_GroupE/adminPages/Report_Sales.php

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<?php
require("../dbCon.php");
require("../commonFunctions.php");
?>
<html>
<head>
<link rel="stylesheet" href="../style.css">
</head>
<body>
<div id="header">
<?php writeMenuAdm("Reports.php"); ?>
</div>
<div id='contentwrapper'>
<?php
if (isset($_GET['Category'])){ //Check if category has already been set
$query = "SELECT * FROM `sales by category` WHERE CategoryID = ?
AND ProductName = ? "; //'?' in place of variable
$ProductName = % . $_GET['ProductName'] . %;
$stmt = $con->prepare($query);
$stmt ->bind_param("ds", $_GET['Category'], $ProductName); //Bind category to query, category is taken in as CategoryID, so it's a digit
$stmt ->execute();
$searchResult = $stmt->get_result(); //Get results
makeTable($searchResult); //Make table from results, makeTable code is in commonFunctions.php
}else{ //If category has not been set, show HTML form to pick category
?>
<form action = "Report_Sales.php" method = "get">
<h1>Sales Report</h1>
<div class="form-group">
<label>Select Product Category</label>
<select name="Category" id="Category">
<?php //Populate category drop down by getting categories from DB
$query ="SELECT * FROM categories"; //Query
$stmt = $con->prepare($query); //'con' is name of DB connection, defined in dbCon.php (which is loaded at the top of this file)
$stmt ->execute(); //Run query
$result = $stmt->get_result(); //Put query results into $results array
while($row = mysqli_fetch_array($result)) { //Iterate through each row of results
echo "<option value='" . $row['CategoryID'] . "'>" . $row['CategoryName'] . "</option>"; //'echo' outputs the given line to the HTML, so this creates a new row in the drop-down for each category
}
?>
</select>
<label>Product Name</label>
<input type="text" name="ProductName" id="ProductName">
<input type="submit" value="View Report">
</div>
</form>
<?php
} //Close bracket from 'else' above
?>
</div>
</body>
</html>