php pdo catching connection exception with custom exception handler

Question

What im trying to achieve here , is when the pdo connection throws an exception , my custom exception handler takes the message and passes it on so i can catch it with my custom exception handler.

try {
       $mysqli = new PDO('mysql:host='.THOST.';dbname='.TDB.'', TUSER, TPASS);
     }   

          catch (PDOException $e) {

              $a = $e->getMessage();
          throw new customException  ( "Failed to connect to MySQL:". $a );   
          die();
          }

         catch (customException $e){ 

                 echo  $e->errorMessage(); 
       }

BUT it returns this error : Fatal error: Uncaught exception 'customException' with message ......

Answer 1

Wrap it in another try-catch block.

try {
  try {
    $mysqli = new PDO('mysql:host='.THOST.';dbname='.TDB.'', TUSER, TPASS);
  } catch(PDOException $e) {
    $a = $e->getMessage();
    throw new customException  ( "Failed to connect to MySQL:". $a );
  }
} catch(customException $e) {
  echo  $e->errorMessage();
  // Do what you want
}