removing unused file

lab-8/music-store-app/views/update-stock.php

-<?php
-
-$content = "<h1>Update Album Stock</h1>";
-
-// define a variable with path to the script which will process form
-// ->	$_SERVER["PHP_SELF"] is a path to the current script (index.php)
-$action = $_SERVER["PHP_SELF"]."?page=update-stock";
-
-// turn autocommit off
-mysqli_autocommit($link, FALSE);
-
-// start a transaction
-mysqli_query($link, 'START TRANSACTION');
-
-// fetch the albums and associated stock info
-// apply FOR UPDATE to prevent reads until 
-// the transaction is completed with COMMIT or ROLLBACK
-$sql = "SELECT a.upc, a.title, i.stock 
-        FROM Album a
-		INNER JOIN Inventory i
-		ON a.upc=i.album_upc
-	    ORDER BY title FOR UPDATE";
-
-$result = mysqli_query($link, $sql);
-
-// check query returned a result
-if ($result === false) {
-    echo mysqli_error($link);
-} else {
-    $options = "";
-    // create an option for each artist
-    while ($row = mysqli_fetch_assoc($result)) {
-        $options .= "<option value='".$row['upc']."'>";
-        $options .= $row['title'];
-        $options .= "</option>";
-    }
-}
-
-// define the form HTML (would ideally be in a template)
-$form_html = "<form action='".$action."' method='POST'>
-				<fieldset>
-					<label for='t_name'>Name:</label>
-					<input type='text' name='t_name' required>
-				</fieldset>
-                <fieldset>
-                    <label for='t_number'>Track number:</label>
-					<input type='number' name='t_number' min='1' max='25'>
-                </fieldset>
-                <fieldset>
-                    <label for='a_upc'>Album:</label>
-                    <select name='a_upc' required>
-						<option value='' disabled selected>Select an album</option>
-
-                        ".$options."
-                    </select>
-                </fieldset>
-                <button type='submit'>Submit</button>
-              </form>";
-
-// append form HTML to content string
-$content .= $form_html;
-
-// ------- START form processing code... -------
-
-
-// define variables and set to empty values
-$title = $artist_id = $price = $year = $genre = "";
-
-// check if there was a POST request
-if ($_SERVER["REQUEST_METHOD"] == "POST") {
-	// validate the form data
-	$a_upc = mysqli_real_escape_string($link, clean_input($_POST["a_upc"]));
-	$t_name =  mysqli_real_escape_string($link, clean_input($_POST["t_name"]));
-	$t_number =  mysqli_real_escape_string($link, clean_input($_POST["t_number"]));
-
-	// define the insertion query
-	$sql = sprintf("INSERT INTO Track (album_upc, name, track_number)
-		VALUES ('%s', '%s', %d)", $a_upc, $t_name, $t_number);
-
-	// run the query to insert the data
-	$result = mysqli_query($link, $sql);
-
-	// check if the query went ok
-	if ($result === false) {
-		mysqli_rollback($link); // if query returns false, rollback transaction
-		// handle specific errors based on mysli error number code
-		// (in order to output more useful message to user!)
-		$errno = mysqli_errno($link);
-		switch ($errno) {
-			case 1062 : // case for duplicate entry
-				$content .= "There is already a track with that name or number.";
-				break;
-			default :
-				echo mysqli_error($link);
-		}
-				
-	} else {
-		mysqli_commit($link); // else, commit transaction
-		$content .= "Track successfully added.";
-	}
-
-    }
-
-    // ------- END form processing code... -------
-
-?>