adding demo code for lecture

38dc044f · Sorrel Harriet · d46075d0 · 38dc044f · 38dc044f
Commit 38dc044f authored 8 years ago by Sorrel Harriet
--- a/lab-5/vending-machine/index.php
+++ b/lab-5/vending-machine/index.php
+<?php
+// open a new MySQL database connection
+// define a connection 'handle'
+$link = mysqli_connect(
+    'localhost',
+    'sharr003',
+    'password123',
+    'sharr003_vendingmachine'
+);
+// check connection succeeded
+if (mysqli_connect_errno()) {
+    echo "Failed to connect to MySQL: " . mysqli_connect_error();
+}
+// create variable for page content HTML
+$content = "<h1>Hot Drinks Menu</h1>";
+// define the SQL query to run
+$sql = "SELECT name, code, price FROM DrinkOption ORDER BY code";
+// fetch records as a result-set
+$result = mysqli_query($link, $sql);
+// check query returned a result
+if ($result === false) {
+    echo mysqli_error($link);
+} else {
+	$content .= "<table>
+					<tbody>";
+    // fetch associative array
+    while ($row = mysqli_fetch_assoc($result)) {
+        $content .= "<tr>
+						<td>".$row['name']."</td>
+						<td>".$row['code']."</td>
+						<td> &pound;".$row['price']."</td>
+					</tr>";
+    }
+	$content .= "</tbody></table>";
+    // free result set
+    mysqli_free_result($result);
+}
+?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+    <head>
+        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+        <title>My First PHP Application</title>
+    </head>
+    <body>
+		<ul>
+			<li><a href="index.php">Home</a></li>
+			<li><a href="page2.php">Page 2</a></li>
+		</ul>
+		<?php
+		// Output value of $content variable
+		echo $content;
+		?>
+    </body>
+</html>
--- a/lab-5/vending-machine/sql/schema.sql
+++ b/lab-5/vending-machine/sql/schema.sql
+DROP TABLE IF EXISTS Selection, DrinkOption;
+CREATE TABLE DrinkOption (
+	code CHAR(2) UNIQUE NOT NULL,
+	drink_name VARCHAR(25) NOT NULL, 
+	price DECIMAL(4,2) DEFAULT 0.80,
+	milk BOOLEAN NOT NULL,
+	PRIMARY KEY (code)
+);
+CREATE TABLE Selection (
+	id INT AUTO_INCREMENT,
+	option_code CHAR(2) NOT NULL,
+	sugars ENUM('0','1','2') NOT NULL,
+	PRIMARY KEY (id),
+	FOREIGN KEY (option_code)
+		REFERENCES DrinkOption (code)
+);
+INSERT INTO DrinkOption VALUES
+('A','Black tea',DEFAULT,0),
+('B','White tea',DEFAULT,1),
+('C','Black coffee',DEFAULT,0),
+('D','White coffee',DEFAULT,1);
+INSERT INTO Selection VALUES
+(NULL, 'A', '1'),
+(NULL, 'D', '0');