php pdo query doesn't work - php

Question

I been trying to implement PDO with prepare(), bindParam() and execute() functions to allow a query to be constructed from data entered by the user.
I wanted to display the list of books and then allow the user to filter the list and then see the new list and the full list.
When I enter criteria into the form to search nothing happens. What am I overlooking?
here is the code
<?php
$pageTitle = "Book List";
$pageHeading = "Book List";
include_once ('header.php');
include_once('databaseConnection.php');
if(isset($_POST['txtSearchBookTitle'])) {
$db = new DatabaseConnection();
$db = $db->db_connection;
$searchTitle = ($_POST['txtSearchBookTitle']);
$sql = $db->prepare("SELECT title FROM tblBook WHERE title LIKE ('%:searchTitle%') ORDER BY title");
$sql->bindParam(':searchTitle', $searchTitle);
$sql->execute();
$result = $sql->fetchAll();
print_r($result);
foreach ($result as $row) {
echo "<li>" . " " . $row["title"]. " " . "</li>";
}
}
?>
<form name="searchBookTitle" method="post" action="<?php echo htmlentities($_SERVER['PHP_SELF']);?>" >
<fieldset>
<legend>Search Books</legend>
<label for="txtSearchBookTitle">Search by Book Title</label>
<input type="text" name="txtSearchBookTitle" id="txtSearchBookTitle">
<input type="submit" value="Submit">
</fieldset>
</form>
<?php
include_once('getBooks.php');
getBooks();
include 'footer.php';
?>

Answer 1

You need to prepare the inputs this way:
$searchTitle = $_POST['txtSearchBookTitle'];
$sql = $db->prepare("SELECT title FROM tblBook WHERE title LIKE :searchTitle ORDER BY title");
$sql->execute(array(':searchTitle' => '%' . $searchTitle . '%'));
Or like this:
$searchTitle = $_POST['txtSearchBookTitle'];
$sql->bindParam(':searchTitle', "%{$searchTitle}%");

Answer 2

Use PDO::FETCH_ASSOC in your fetchAll.. it means it will return the data as an array
So make it like this one
$result = $sql->fetchAll(PDO::FETCH_ASSOC);