function delete_entry($id)
{
$file = open_book_file();
$item_to_remove = "/" . search_file_for_id($id) . "/";
for ($x = 0; $x < count($file); $x++) {
if (preg_match($item_to_remove, $file[$x])) {
$file[$x] = "";
}
}
rewrite_file($file, "books.txt");
}
<link rel="stylesheet" type="text/css" href="style.css" media="all" />
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="myjquery.js"></script>
</head>
<body>
<div class="container" id="top">
<h1><a href="biags_library.php">Biag's Library</a></h1>
<div id="to_top"><a href='#top'>Top</a></div>
<div id="view_all">
<p>Select the letter corrensponding to the first letter of the book title.</p><br/>
<?php
$alpha = array('A', 'B', 'C', 'D', 'E', 'F', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z');
foreach ($alpha as $letter) {
echo "<a class='letter' href='#{$letter}'>" . strtoupper($letter) . "</a> ";
}
$file = open_book_file();
foreach ($alpha as $letter) {
echo "<h2 class='alpha' id='{$letter}'>" . strtoupper($letter) . "</h2>";
foreach ($file as $element) {
$book = explode("\t", $element);
if (preg_match("/^" . $letter . "/i", $book[1])) {
echo "<div class='found_book'>";
echo "<span class='book_head'>Title: </span>" . $book[1] . "<br/>";
echo "<span class='book_head'>Author: </span>" . $book[2];
echo "<span class='options'>";
echo '<a href="update.php?id=' . $book[0] . '">Update</a>';
echo '<a href="remove.php?id=' . $book[0] . '">Delete</a>';
echo '<a href="view.php?id=' . $book[0] . '">View</a>';
echo "</span>";
echo "</div>";
}
