What are the best practices for catching and re-throwing exceptions?

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Should caught exceptions be re-thrown directly, or should they be wrapped around a new exception?

That is, should I do this:

try {
  $connect = new CONNECT($db, $user, $password, $driver, $host);
} catch (Exception $e) {
  throw $e;
}

or this:

try {
  $connect = new CONNECT($db, $user, $password, $driver, $host);
} catch (Exception $e) {
  throw new Exception("Exception Message", 1, $e);
}

If your answer is to throw directly please suggest the use of exception chaining, I am not able to understand a real world scenario where we use exception chaining.

Best Answer
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