Description:
------------
Scripts will terminate (immediately) when an error occured while accessing databases.

Reproduce code:
---------------
<?php
class xPDO
{
public static $pdo;
        public function connect ()
        {
                $dsn = 'mssql:host=127.0.0.1; dbname=mydb';
                $user = 'error_user';
                $password = 'error_passwd';
                try {
                $this->pdo = new PDO($dsn, $user, $password);
                } catch (PDOException $e) {
                   echo 'Connection failed: ' . $e->getMessage();
                }
        }
}
$a = new xPDO();
$a->connect();
?>

Expected result:
----------------
The statement is excuted normally and throws error information.


Actual result:
--------------
script crash