updating lab 5 example code

lab-5/music-store-app/album.php

+<?php
+
+// open a new MySQL database connection
+
+// define a connection 'handle'
+$link = mysqli_connect(
+    'localhost',
+    'sharr003',
+    'password123',
+    'sharr003_musicstore'
+);
+
+// check connection succeeded
+if (mysqli_connect_errno()) {
+    exit(mysqli_connect_error());
+}
+
+// define the SQL query to run (from lab 3 queries.sql!)
+// use column aliases if necessary to make referencing fields in result-set easier
+$sql = "SELECT t.name AS track, t.track_number, a.title AS album
+FROM Track t
+INNER JOIN Album a
+    ON t.album_upc=a.upc
+WHERE a.upc='018274372722'
+ORDER BY track_number ASC";
+
+// query the database
+$result = mysqli_query($link, $sql);
+
+// define a variable for HTML content string
+$content = "";
+
+// get number of rows in result-set
+$row_cnt = mysqli_num_rows($result);
+
+// check if there are rows to display...
+if ($row_cnt == 0) {
+	// if not, output a suitable message
+	$content .= "<p>The album you requested was not found!</p>";
+} else {
+	// otherwise, update the HTML in $content
+
+	// get a single row from the result-set as an enumerated array
+	$row = mysqli_fetch_row($result);
+	// reference the first item in the array by index
+	$content .= "<h1>".$row[0]."</h1>";
+	$content .= "<table cellpadding='4' border='1'>
+					<thead align='left'>
+						<tr>
+							<th>Track name</th>
+							<th>Track number</th>
+						</tr>
+					</thead>
+					<tbody>";
+    // while there are rows, fetch each row as an associative array
+    while ($row = mysqli_fetch_assoc($result)) {
+		// append the content with more HTML containing row data
+		$content .= "<tr>
+						<td>".$row['track']."</td> 
+						<td>".$row['track_number']."</td>
+					</tr>"; // reference a field value in the array by its key!
+    }
+    // free result set
+    mysqli_free_result($result);
+
+	$content .= "</tbody></table>";
+}
+
+// close the connection to the database */
+mysqli_close($link);
+
+// output the HTML
+
+echo $content;
+
+?>

lab-5/music-store-app/index.php

@@ -5,9 +5,9 @@
 // define a connection 'handle'
 $link = mysqli_connect(
     'localhost',
-    'YOUR_USERNAME',
-    'YOUR_PASSWORD',
-    'YOUR_DB_NAME'
+    'sharr003',
+    'password123',
+    'sharr003_musicstore'
 );
 
 // check connection succeeded
@@ -15,30 +15,65 @@ if (mysqli_connect_errno()) {
     exit(mysqli_connect_error());
 }
 
-// define the SQL query to run (from lab 3!)
-$sql = "SELECT Album.title, Album.price, Artist.first_name, Artist.last_name, Genre.name AS genre, (SELECT COUNT(*) FROM Track WHERE Album.upc=Track.album_upc) AS num_tracks FROM Album 
-INNER JOIN Artist 
-	ON Album.artist_id=Artist.id 
+// define the SQL query to run (from lab 3 queries.sql!)
+// use column aliases if necessary to make referencing fields in result-set easier
+$sql = "SELECT Album.title, Album.price, Artist.first_name, Artist.last_name, Genre.name AS genre, (SELECT COUNT(*) FROM Track WHERE Album.upc=Track.album_upc) AS num_tracks
+FROM Album
+INNER JOIN Artist
+    ON Album.artist_id=Artist.id
 INNER JOIN Genre
-	ON Album.genre_id=Genre.id 
-ORDER BY title ASC";
+    ON Album.genre_id=Genre.id
+ORDER BY title ASC;";
+
+// query the database
 $result = mysqli_query($link, $sql);
 
-// check query returned a result
-if ($result === false) {
-    echo mysqli_error($link);
+// define a variable for HTML content string
+$content = "<h1>Albums</h1>";
+
+// get number of rows in result-set
+$row_cnt = mysqli_num_rows($result);
+
+// check if there are rows to display...
+if ($row_cnt == 0) {
+	// if not, output a suitable message
+	$content .= "<p>There are no albums in the databased!</p>";
 } else {
- //   $row_cnt = mysqli_num_rows($result);
-   // echo $row_cnt
-    // fetch associative array */
+	// otherwise, update the HTML in $content
+
+	$content .= "<table cellpadding='4' border='1'>
+					<thead align='left'>
+						<tr>
+							<th>Album name</th>
+							<th>Artist name</th>
+							<th>Price</th>
+							<th>Genre</th>
+							<th>Number of tracks</th>
+						</tr>
+					</thead>
+					<tbody>";
+    // while there are rows, fetch each row as an associative array
     while ($row = mysqli_fetch_assoc($result)) {
-        echo($row['title']." (".$row['genre'].") ");
+		// append the content with more HTML containing row data
+		$content .= "<tr>
+						<td>".$row['title']."</td> 
+						<td>".$row['first_name']." ".$row['last_name']."</td> 
+						<td>&pound;".$row['price']."</td> 
+						<td>".$row['genre']."</td> 
+						<td>".$row['num_tracks']."</td>
+					</tr>"; // reference a field value in the array by its key!
     }
     // free result set
     mysqli_free_result($result);
+
+	$content .= "</tbody></table>";
 }
 
 // close the connection to the database */
-mysqli_close($link)
+mysqli_close($link);
+
+// output the HTML
+
+echo $content;
 
 ?>