Data does not display from PDO and MySQL - php

Question

Sorry if the title is vague, was unsure how to word it.
Currently, I'm trying to just do a simple piece of php that runs a query and displays all the data in the database, but no data is displaying the page is just completely blank.
Here is the code:
<?php
$username = "user";
$password = "pass";
try {
$conn = new PDO('mysql:host=localhost;dbname=database', $username, $password);
$stmt = $conn->prepare('SELECT * FROM contacts');
$stmt->execute(array('id' => $id));
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
if ( count($result) ) {
foreach ($result as $query_row)
{
extract($query_row);
echo '<tr>';
echo '<td>'.$fname.'</td>';
echo '<td>'.$lname.'</td>';
echo '<td>'.$title.'</td>';
echo '<td>'.$deparment.'</td>';
echo '<td>'.$email.'</td>';
echo '<td>'.$cell.'</td>';
echo '<td>'.$handle.'</td>';
echo '<td>'.$steam.'</td>';
echo '<td>'.$skype.'</td>';
echo '</tr>';
}
}
} else {
echo "No rows returned.";
}
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
?>
I've never worked with PDO before so I've been following a guide/reading different SO questions trying to get a grasp on it. One line that I think may be screwing up is this line:
$stmt->execute(array('id' => $id));
I don't understand what that line is doing and if an I can get an explanation that would be great. I believe I understand the logic behind the rest of the code though.

Answer 1

This should solve your problem (it worked on my server).
Plus, I added the <table> and </table> tags and placed in their respective locations.
<?php
$username = "user";
$password = "pass";
try {
// uncomment for testing purposes as noted by jeroen
// $conn = new PDO('mysql:host=localhost;dbname=database', $username, $password, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));
$conn = new PDO('mysql:host=localhost;dbname=database', $username, $password);
$stmt = $conn->prepare('SELECT * FROM contacts');
$stmt->execute(array('id' => $id));
// $stmt->execute(); // as noted by Mike Brant
}
catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
echo "<table>";
if ( count($result) ) {
foreach ($result as $query_row)
{
extract($query_row);
echo '<tr>';
echo '<td>'.$fname.'</td>';
echo '<td>'.$lname.'</td>';
echo '<td>'.$title.'</td>';
echo '<td>'.$deparment.'</td>';
echo '<td>'.$email.'</td>';
echo '<td>'.$cell.'</td>';
echo '<td>'.$handle.'</td>';
echo '<td>'.$steam.'</td>';
echo '<td>'.$skype.'</td>';
echo '</tr>';
}
}
echo "</table>";
?>