Finding library details based on user search input - using LIMIT and OFFSET - php

Question

Basically I have 4 fields in a form. I want to the user search for books in a library by either title, or by author or both. I also want the user to set the length of the list of items and from the starting point, these are not restrictions though the user does not have to specify.
Here is the code:
require_once __DIR__.'/config.php';
session_start();
$dbh = new PDO('mysql:host=' . DB_HOST . ';dbname=' . DB_USERNAME, DB_USERNAME, DB_PASSWORD);
$title = $_GET["title"];
$authors = $_GET["authors"];
$st = $_GET["start"];
$ln = $_GET["length"];
$stmt = $dbh->prepare("SELECT title, authors, description, price FROM books WHERE title = :title LIMIT :length OFFSET :start");
$stmt->execute(array(':title' => $title,':start' => $st,':length' => $ln));
while ($row = $stmt->fetch(PDO::FETCH_ASSOC))
{
$title = $row['title'];
$authors = $row['authors'];
$description = $row['description'];
$price = $row['price'];
}
echo "<table>";
echo "<tr>";
echo "<td>Title</td>";
echo "<td>$title</td>";
echo "</tr>";
echo "<tr>";
echo "<td>Authors</td>";
echo "<td>$authors</td>";
echo "</tr>";
echo "<tr>";
echo "<td>Description</td>";
echo "<td>$description</td>";
echo "</tr>";
echo "<tr>";
echo "<td>Price</td>";
echo "<td>$price</td>";
echo "</tr>";
echo "</table>";
So far it literally just returns me what I have typed in the input - so nothing much at all! Does anyone know how I can do this?

Answer 1

Adapt your code this way:
echo "<table>";
while ($row = $stmt->fetch(PDO::FETCH_ASSOC))
{
$title = $row['title'];
$authors = $row['authors'];
$description = $row['description'];
$price = $row['price'];
echo "<tr>";
echo "<td>Title</td>";
echo "<td>$title</td>";
echo "</tr>";
echo "<tr>";
echo "<td>Authors</td>";
echo "<td>$authors</td>";
echo "</tr>";
echo "<tr>";
echo "<td>Description</td>";
echo "<td>$description</td>";
echo "</tr>";
echo "<tr>";
echo "<td>Price</td>";
echo "<td>$price</td>";
echo "</tr>";
}
echo "</table>";
to print all the rows returned by the query. Your code was printing just the last row.