pdo事务提交确认

Question

New to using transactions and cannot find a definitive answer on this on the web. In this example, I realize query1 and query2 both must succeed for anything to be committed to the database and the catch will run if they don't...

Does code entered after commit() ( more code here in this example) ONLY run if the transaction occurred or will it run regardless?

try {
    $db->beginTransaction();

    query1

    query2

    $db->commit();

    **more code here**
}
catch(Exception $e)
{   
    $db->rollback();

    some error message
}

Answer 1

if an exception is thrown, remaining code in the try {} block will not be executed

http://php.net/manual/en/language.exceptions.php

When an exception is thrown, code following the statement will not be executed, and PHP will attempt to find the first matching catch block.