PDO connection try catch include - php

Question

I'm new to PDO and I wanna do it right from the beginning - I'm going to replace my old mysql_ functions on a site.
Have I got it right?:
Should I put the connection code in a try/catch and save it to a file, and include it on top of the page. Then put the queries in try/catch as well.
Or:
Should I put the connection code in a file and include it in the in the top of the try/catch statement above the query?
ver1:
include('pdo.php'); // try/catch in file
try {
$stmt = $conn->prepare('SELECT * FROM myTable WHERE id = :id');
$stmt->execute(array('id' => $id));
while($row = $stmt->fetch()) {
print_r($row);
}
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
ver2:
try {
include('pdo.php'); // no try/catch in file
$stmt = $conn->prepare('SELECT * FROM myTable WHERE id = :id');
$stmt->execute(array('id' => $id));
while($row = $stmt->fetch()) {
print_r($row);
}
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
Or should I put the try/catch in both places?

Answer 1

You should do both and even more :
Set an error handler that displays a message to the user and stops the PHP (see set_error_handler)
When you initiate the connexion, add a try/catch and throw an error if you catch an exception. Your website won't run without database connection i guess.
Do a try/catch around your queries to recover gracefully from error (when you can)