PDOException

PDOException represents an error raised by PDO. It is recommended to never throw a PDOException from custom code, and only catch such exception, emitted directly by the PHP engine.

<?php

    try {
      $pdo = new PDO('sqlite:myfile.sqlite');
    } catch(PDOException $e) {
        die('Unable to open database connection');
    }

?>

Documentation

Related : Exception