updating album.php to remove logical row count error

lab-6/music-store-app/views/album.php

@@ -33,11 +33,14 @@ else {
 	} 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'>
+		// define a row counter
+		$i = 0;
+		// while there are rows, fetch each row as an associative array
+		while ($row = mysqli_fetch_assoc($result)) {
+			// if first row, output header and start of table
+			if ($i == 0) {
+				$content .= "<h1>".$row['album']."</h1>";
+				$content .= "<table cellpadding='4' border='1'>
 						<thead align='left'>
 							<tr>
 								<th>Track name</th>
@@ -45,13 +48,15 @@ else {
 							</tr>
 						</thead>
 						<tbody>";
-		// while there are rows, fetch each row as an associative array
-		while ($row = mysqli_fetch_assoc($result)) {
+				$content .= "<p>The album has $row_cnt tracks.</p>";
+			}
 			// 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!
+			// increment row counter
+			$i++;
 		}
 		// free result set
 		mysqli_free_result($result);

lab-7/music-store-app/views/album.php

+<?php
+
+// check if upc parameter set in query string
+if (!isset($_GET['upc'])) {
+	// it is not set, so don't run the script
+	$content .= "<p>I don't know what album you're looking for...</p>";
+}
+else {
+	// continue running the script...
+
+	// set a variable to store Album.upc value
+	$upc = $_GET['upc'];
+
+	// define the SQL query to run (from lab 3 queries.sql!)
+	// use column aliases if necessary to make referencing fields in result-set easier
+	$sql = "SELECT t.name AS track, t.track_number, a.title AS album
+	FROM Track t
+	INNER JOIN Album a
+		ON t.album_upc=a.upc
+	WHERE a.upc='$upc'
+	ORDER BY track_number ASC";
+
+	// query the database
+	$result = mysqli_query($link, $sql);
+
+	// 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 either not found or has no tracks!</p>";
+	} else {
+		// otherwise, update the HTML in $content
+		
+
+		// while there are rows, fetch each row as an associative array
+		// define a row counter
+		$i = 0;
+		while ($row = mysqli_fetch_assoc($result)) {
+			// if first row, output header and start of table
+			if ($i == 0) {
+				$content .= "<h1>".$row['album']."</h1>";
+				$content .= "<table cellpadding='4' border='1'>
+						<thead align='left'>
+							<tr>
+								<th>Track name</th>
+								<th>Track number</th>
+							</tr>
+						</thead>
+						<tbody>";
+				$content .= "<p>The album has $row_cnt tracks.</p>";
+			}
+			// 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!
+			// increment row counter
+			$i++;
+		}
+		// free result set
+		mysqli_free_result($result);
+
+		$content .= "</tbody></table>";
+	}
+} // end if/else
+
+?>