php - How to display my own errors instead of default errors using pdo connection? -

i want display own errors instead of default errors using pdo connection.the error can categorized as

1. if database doesn't exist

2. access denied

3. host name invalid

a simple code of pdo connection is

<?php $host = 'localhost'; $dbname = 'test'; $user = 'root'; $password = '';  try {     $db = new pdo("mysql:host=$host;dbname=$dbname", $user, $password);   } catch (pdoexception $e) {  echo $e->getmessage();  }  ?> 

now, can use if statements in catch section? if so, how can achieve output? don't want use getmessage() function.

thanks

first, use driver_options param of constructor make exceptions being thrown on errors:

$db = new pdo("mysql:host=$host;dbname=$dbname", $user, $password, array(     pdo::attr_errmode => pdo::errmode_exception )); 

then in catch block you'll have analyze code property of exception:

switch($e->getcode()) {      ....  } 

you'll find list of codes , meaning in mysql manual